Skip to main content

Leantime EUVDEUVD-2026-62708

| CVE-2026-76647 HIGH
Information Exposure (CWE-200)
2026-08-19 certcc GHSA-62fx-wqcf-qg97
8.8
CVSS 3.1 · Vendor: certcc
Share

Severity by source

Vendor (certcc) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Network-accessible API requires only a valid low-privilege session; account takeover yields full C/I impact, and victim lockout constitutes availability loss.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (certcc).

CVSS VectorVendor: certcc

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Aug 27, 2026 - 18:05 vuln.today
CVSS changed
Aug 27, 2026 - 17:22 NVD
8.8 (HIGH)
CVE Published
Aug 19, 2026 - 19:26 cve.org
HIGH 8.8
CVE Published
Aug 19, 2026 - 19:26 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Leantime JSON-RPC API through version 3.9.0 contains a missing authorization vulnerability in the JSON-RPC dispatcher in app/Domain/Api/Controllers/Jsonrpc.php. The dispatcher does not enforce authorization before invoking service-layer methods, allowing an authenticated user to call methods or act on resources outside their intended permissions. For example, the editOwn method accepts a user-supplied user ID without verifying that it belongs to the caller, allowing an attacker to modify another user's account and set a new password, resulting in account takeover. This vulnerability is distinct from CVE-2026-59712 and CVE-2026-15509 because the root cause is the lack of centralized authorization enforcement in the JSON-RPC dispatcher rather than the behavior of an individual exposed method.

AnalysisAI

Missing centralized authorization in Leantime's JSON-RPC API dispatcher (through v3.9.0) enables any authenticated user to invoke service-layer methods against arbitrary resources they do not own, resulting in full account takeover of other users including administrators. The dispatcher in app/Domain/Api/Controllers/Jsonrpc.php routes API calls without an authorization gate, allowing a caller to supply a victim's user ID to the editOwn method and overwrite their password. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate with any low-privilege Leantime account
Delivery
Identify target user ID via API or UI enumeration
Exploit
Craft JSON-RPC editOwn request with victim user ID
Execution
Dispatcher routes call without authorization check
Persist
Service layer resets victim's password to attacker-controlled value
Impact
Authenticate as victim and take over account

Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to hold a valid authenticated session in the Leantime instance at any privilege level (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the severity: network-accessible, low complexity, requiring only a valid low-privilege account. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated low-privilege Leantime user - such as a guest or project member - sends a crafted JSON-RPC POST request to the /api/jsonrpc endpoint calling the editOwn method with a victim administrator's user ID substituted in the payload. Because the dispatcher invokes the service-layer method without verifying that the supplied user ID matches the session owner, the service sets a new attacker-controlled password for the administrator account. …
Remediation No vendor-released patch version is identified in the available data - patch status is unconfirmed and should be verified directly with the Leantime project. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, review JSON-RPC API access logs (app/Domain/Api/Controllers/Jsonrpc.php) for unauthorized method invocations and audit recent user password changes for anomalies. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

More in PHP

View all
CVE-2019-11043 CRITICAL POC
9.8 Oct 28

In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it

CVE-2012-1823 CRITICAL POC
9.8 May 11

sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not

CVE-2016-1555 CRITICAL POC
9.8 Apr 21

(1) boardData102.php, (2) boardData103.php, (3) boardDataJP.php, (4) boardDataNA.php, and (5) boardDataWW.php in Netgear

CVE-2018-11138 CRITICAL POC
9.8 May 31

The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible by

CVE-2024-11680 CRITICAL POC
9.8 Nov 26

ProjectSend versions prior to r1720 are affected by an improper authentication vulnerability. Rated critical severity (C

CVE-2025-49113 CRITICAL POC
9.9 Jun 02

Roundcube Webmail contains a critical PHP object deserialization vulnerability (CVE-2025-49113, CVSS 9.9) that allows au

CVE-2017-9841 CRITICAL POC
9.8 Jun 27

Util/PHP/eval-stdin.php in PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP c

CVE-2025-0108 HIGH POC
8.8 Feb 12

Palo Alto Networks PAN-OS management web interface contains an authentication bypass allowing unauthenticated attackers

CVE-2021-25298 HIGH POC
8.8 Feb 15

Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re

CVE-2021-25296 HIGH POC
8.8 Feb 15

Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re

CVE-2013-4983 CRITICAL POC
10.0 Sep 10

The get_referers function in /opt/ws/bin/sblistpack in Sophos Web Appliance before 3.7.9.1 and 3.8 before 3.8.1.1 allows

CVE-2023-6553 CRITICAL POC
9.8 Dec 15

The Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1

Share

EUVD-2026-62708 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy