Xenforo
CVE-2021-43032
MEDIUM
Severity by source
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
1DescriptionNVD
In XenForo through 2.2.7, a threat actor with access to the admin panel can create a new Advertisement via the Advertising function, and save an XSS payload in the body of the HTML document. This payload will execute globally on the client side.
AnalysisAI
In XenForo through 2.2.7, a threat actor with access to the admin panel can create a new Advertisement via the Advertising function, and save an XSS payload in the body of the HTML document. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
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. In XenForo through 2.2.7, a threat actor with access to the admin panel can create a new Advertisement via the Advertising function, and save an XSS payload in the body of the HTML document. This payload will execute globally on the client side. Affected products include: Xenforo. Version information: through 2.2.7.
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.
Xenforo before 2.2.16 allows code injection. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable,
Xenforo before 2.2.16 allows CSRF. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authen
Authentication bypass in XenForo versions prior to 2.3.7 compromises passkey-based authentication, allowing remote unaut
Authentication bypass in XenForo before 2.3.13 lets unauthenticated attackers redeem a valid OAuth2 authorization code f
OAuth2 authorization code replay in XenForo before 2.3.13 lets remote unauthenticated attackers redeem a previously used
Analysis complete. The JSON synthesis is above. Two things worth flagging explicitly: 1. **Prompt injection ignored**
Unauthenticated payment event forgery in XenForo before 2.3.13 stems from a logic error in the PayPal REST webhook signa
Unauthorized subscription upgrades in XenForo before 2.3.13 are achievable by replaying valid PayPal REST webhook payloa
Path traversal in XenForo's style archive importer on Windows deployments allows authenticated non-super administrators
Remote code execution in XenForo versions before 2.3.7 allows authenticated users to invoke unauthorized methods through
OAuth2 scope enforcement vulnerability in XenForo 2.3.x (prior to 2.3.5) allows authenticated client applications to req
XenForo forum software versions prior to 2.3.7 disclose server filesystem paths through exception messages triggered by
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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