Information Disclosure
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
How It Works
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security. This happens through multiple channels: verbose error messages that display stack traces revealing internal paths and frameworks, improperly secured debug endpoints left active in production, and misconfigured servers that expose directory listings or version control artifacts like .git folders. APIs often leak excessive data in responses—returning full user objects when only a name is needed, or revealing system internals through metadata fields.
Attackers exploit these exposures systematically. They probe for common sensitive files (.env, config.php, backup archives), trigger error conditions to extract framework details, and analyze response timing or content differences to enumerate valid usernames or resources. Even subtle variations—like "invalid password" versus "user not found"—enable account enumeration. Exposed configuration files frequently contain database credentials, API keys, or internal service URLs that unlock further attack vectors.
The attack flow typically starts with passive reconnaissance: examining HTTP headers, JavaScript bundles, and public endpoints for version information and architecture clues. Active probing follows—testing predictable paths, manipulating parameters to trigger exceptions, and comparing responses across similar requests to identify information leakage patterns.
Impact
- Credential compromise: Exposed configuration files, hardcoded secrets in source code, or API keys enable direct authentication bypass
- Attack surface mapping: Stack traces, framework versions, and internal paths help attackers craft targeted exploits for known vulnerabilities
- Data breach: Direct exposure of user data, payment information, or proprietary business logic through oversharing APIs or accessible backups
- Privilege escalation pathway: Internal URLs, service discovery information, and architecture details facilitate lateral movement and SSRF attacks
- Compliance violations: GDPR, PCI-DSS, and HIPAA penalties for exposing regulated data through preventable disclosures
Real-World Examples
A major Git repository exposure affected thousands of websites when .git folders remained accessible on production servers, allowing attackers to reconstruct entire source code histories including deleted commits containing credentials. Tools like GitDumper automated mass exploitation of this misconfiguration.
Cloud storage misconfigurations have repeatedly exposed sensitive data when companies left S3 buckets or Azure Blob containers publicly readable. One incident exposed 150 million voter records because verbose API error messages revealed the storage URL structure, and no authentication was required.
Framework debug modes left enabled in production have caused numerous breaches. Django's DEBUG=True setting exposed complete stack traces with database queries and environment variables, while Laravel's debug pages revealed encryption keys through the APP_KEY variable in environment dumps.
Mitigation
- Generic error pages: Return uniform error messages to users; log detailed exceptions server-side only
- Disable debug modes: Enforce production configurations that suppress stack traces, verbose logging, and debug endpoints through deployment automation
- Access control audits: Restrict or remove development artifacts (
.git, backup files,phpinfo()) and internal endpoints before deployment - Response minimization: API responses should return only necessary fields; implement allowlists rather than blocklists for data exposure
- Security headers: Deploy
X-Content-Type-Options, remove server version banners, and disable directory indexing - Timing consistency: Ensure authentication and validation responses take uniform time regardless of input validity
Recent CVEs (69747)
Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have an out-of-bounds read vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have an out-of-bounds read vulnerability. Rated low severity (CVSS 3.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have an out-of-bounds read vulnerability. Rated low severity (CVSS 3.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have an out-of-bounds read vulnerability. Rated low severity (CVSS 3.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have an out-of-bounds read vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have a disclosure of sensitive data vulnerability. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
A vulnerability exsists in IBM Planning Analytics 2.0 whereby avatars in Planning Analytics Workspace could be modified by other users without authorization to do so. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. Rated high severity (CVSS 7.1), this vulnerability is low attack complexity. This Incorrect Permission Assignment vulnerability could allow attackers to access resources due to misconfigured permissions.
GUnet Open eClass Platform (aka openeclass) before 3.11 might allow remote attackers to read students' submitted assessments because it does not ensure that the web server blocks directory listings,. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The TIBCO Data Virtualization Server component of TIBCO Software Inc.'s TIBCO Data Virtualization and TIBCO Data Virtualization for AWS Marketplace contains a vulnerability that theoretically allows. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In Elasticsearch before 7.9.0 and 6.8.12 a field disclosure flaw was found when running a scrolling search with Field Level Security. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Elastic Enterprise Search before 7.9.0 contain a credential exposure flaw in the App Search interface. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Memory access out of buffer boundaries issues was discovered in Contiki-NG 4.4 through 4.5, in the SNMP BER encoder/decoder. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The package irrelon-path before 4.7.0; the package @irrelon/path before 4.7.0 are vulnerable to Prototype Pollution via the set, unSet, pushVal and pullVal functions. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The package connie-lang before 0.1.1 are vulnerable to Prototype Pollution in the configuration language library used by connie. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
An elevation of privilege vulnerability exists when the Windows Ancillary Function Driver for WinSock improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An elevation of privilege vulnerability exists in the way that Microsoft Office Click-to-Run (C2R) components handle objects in memory. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
An elevation of privilege vulnerability exists when the Windows Function Discovery SSDP Provider improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (ASLR) bypass. Rated medium severity (CVSS 4.7).
An information disclosure vulnerability exists when DirectWrite improperly discloses the contents of its memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the "Public Account Pictures" folder improperly handles junctions. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required.
An elevation of privilege vulnerability exists in the way that the Windows WalletService handles objects in memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Work Folder Service improperly handles file operations. Rated high severity (CVSS 8.0).
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows CDP User Components improperly handle memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows CDP User Components improperly handle memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when the Windows WaasMedic Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows UPnP Device Host improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Backup Service improperly handles file operations. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists in the way that the Windows WalletService handles objects in memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Accounts Control improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when Windows Remote Access improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Radio Manager API improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Custom Protocol Engine improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Network Connection Broker improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Speech Shell Components improperly handle memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Speech Runtime improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Speech Runtime improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows UPnP Device Host improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows File Server Resource Management Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows File Server Resource Management Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Work Folders Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Telephony Server improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows CSC Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when the Windows State Repository Service improperly handles objects in memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when the win32k component improperly provides kernel information. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.
An elevation of privilege vulnerability exists in the Local Security Authority Subsystem Service (LSASS) when an authenticated attacker sends a specially crafted authentication request. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when Microsoft SharePoint Server fails to properly handle objects in memory. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
An information disclosure vulnerability exists when attaching files to Outlook messages. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
An elevation of privilege vulnerability exists when the Storage Service improperly handles file operations. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows CSC Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when Media Foundation improperly handles objects in memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An information disclosure vulnerability exists when the Windows Image Acquisition (WIA) Service improperly discloses contents of its memory. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Work Folders Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when ASP.NET or .NET web applications running on IIS improperly allow access to cached files. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists in the way that the srmsvc.dll handles objects in memory. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
An information disclosure vulnerability exists when the Windows Image Acquisition (WIA) Service improperly discloses contents of its memory. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
An elevation of privilege vulnerability exists when the Windows Work Folders Service improperly handles memory. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
An elevation of privilege vulnerability exists when Windows improperly handles hard links. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An information disclosure vulnerability exists on ARM implementations that use speculative execution in control flow via a side-channel analysis, aka "straight-line speculation." To exploit. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An information disclosure vulnerability exists in RPC if the server has Routing and Remote Access enabled. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
An elevation of privilege vulnerability exists when the Windows Kernel API improperly handles registry objects in memory. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Multiple vulnerabilities in the user interface of Cisco Webex Meetings Desktop App could allow an authenticated, remote attacker to obtain restricted information from other Webex users. Rated medium severity (CVSS 4.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Multiple vulnerabilities in the user interface of Cisco Webex Meetings Desktop App could allow an authenticated, remote attacker to obtain restricted information from other Webex users. Rated medium severity (CVSS 4.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the contacts feature of Cisco Webex Meetings could allow an authenticated, remote attacker with a legitimate user account to access sensitive information. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the CLI of Cisco AsyncOS for Cisco Email Security Appliance (ESA) and Cisco AsyncOS for Cisco Content Security Management Appliance (SMA) could allow an authenticated, remote. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to overwrite VPN profiles on an. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability in Cisco DNA Center software could allow an unauthenticated remote attacker access to sensitive information on an affected system. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The package linux-cmdline before 1.0.1 are vulnerable to Prototype Pollution via the constructor. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
LuaJIT through 2.1.0-beta3 has an out-of-bounds read in lj_err_run in lj_err.c. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
lgc.c in Lua 5.4.0 mishandles the interaction between barriers and the sweep phase, leading to a memory access violation involving collectgarbage. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Huawei 5G Mobile WiFi E6878-370 with versions of 10.0.3.1(H563SP1C00),10.0.3.1(H563SP21C233) have an improper authorization vulnerability. Rated high severity (CVSS 7.0), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.