Opencats
CVE-2021-25295
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
OpenCATS through 0.9.5-3 has multiple Cross-site Scripting (XSS) issues. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. OpenCATS through 0.9.5-3 has multiple Cross-site Scripting (XSS) issues. Affected products include: Opencats. Version information: through 0.9.5.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
OpenCATS through 0.9.5-3 has multiple Cross-site Scripting (XSS) issues.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)NVD
Remote code execution in OpenCATS installer allows unauthenticated attackers to inject and execute arbitrary PHP code by
OpenCATS v0.9.6 was discovered to contain a remote code execution (RCE) vulnerability via the getDataGridPager's ajax fu
OpenCATS through 0.9.6 allows remote attackers to execute arbitrary code by uploading an executable file via lib/FileUti
OpenCATS through 0.9.5-3 unsafely deserializes index.php?m=activity requests, leading to remote code execution. Rated cr
OpenCATS 0.9.4 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary
SQL injection in OpenCATS through 0.9.7.4 allows authenticated users to extract arbitrary database contents by injecting
lib/DocumentToText.php in OpenCats before 0.9.4-3 has XXE that allows remote users to read files on the underlying opera
OpenCATS v0.9.6 was discovered to contain a SQL injection vulnerability via the importID parameter in the Import viewerr
OpenCATS v0.9.6 was discovered to contain a SQL injection vulnerability via the tag_id variable in the Tag deletion func
OpenCATS v0.9.6 was discovered to contain a SQL injection vulnerability via the entriesPerPage variable. Rated medium se
OpenCATS v0.9.6 was discovered to contain a SQL injection vulnerability via the tag_id variable in the Tag update functi
Improper neutralization of input during web page generation allows an unauthenticated attacker to submit malicious Javas
Exploit-DB