XenForo vulnerabilities
We track 14 vulnerabilities in XenForo products. 14 are rated high or critical, and none are known to be exploited. The most recent was published on September 8, 2026.
Latest XenForo vulnerabilities
- 7.2 High severity
XenForo: Improper Limitation of a Pathname to a Restricted Directory
XenForo before 2.3.13 contains a path traversal vulnerability in the style archive importer on Windows deployments that allows authenticated non-super administrators with style permissions to write arbitrary files outside the intended extraction directory by u
- 7.5 High severity
XenForo: Insufficient Verification of Data Authenticity
XenForo before 2.3.13 contains a payment replay vulnerability in the PayPal REST payment provider that allows attackers to process the same webhook payload multiple times by exploiting a missing duplicate transaction ID check. Attackers can replay a valid webh
- 8.6 High severity
XenForo: Server-Side Request Forgery
XenForo before 2.3.13 contains a server-side request forgery vulnerability in the PayPal REST webhook handler that allows unauthenticated attackers to cause the server to make outbound HTTP requests to arbitrary destinations by supplying a crafted certificate
- 7.5 High severity
XenForo: Improper Check for Unusual or Exceptional Conditions
XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler that allows unauthenticated attackers to bypass payment signature validation by submitting a webhook request with an unsupported auth_algo header value. When
- 8.1 High severity
XenForo: Incorrect Authorization
XenForo before 2.3.13 contains a multi-factor authentication bypass vulnerability in the passkey TFA provider that allows an authenticated attacker to complete login as another user by submitting their own registered passkey credential during the WebAuthn asse
- 7.4 High severity
XenForo: Authentication Bypass by Capture-replay
XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the
- 7.4 High severity
XenForo: Authentication Bypass by Capture-replay
XenForo before 2.3.13 contains an OAuth2 authorization code reuse vulnerability that allows attackers to obtain unauthorized token pairs by submitting a previously used authorization code. Attackers can exploit the failure to invalidate or mark authorization c
- 9.1 Critical severity
XenForo: Incorrect Comparison
XenForo before 2.3.13 contains an authentication bypass vulnerability in the OAuth2 token endpoint that allows unauthenticated attackers to obtain valid token pairs by submitting empty values for client_secret and code_verifier parameters. Attackers can exploi
- 7.2 High severity
XenForo: Improper Control of Generation of Code
XenForo before 2.3.9 and before 2.2.18 allows remote code execution (RCE) by authenticated, but malicious, admin users. An attacker with admin panel access can execute arbitrary code on the server.
- 7.5 High severity
XenForo: Generation of Error Message Containing Sensitive Information
XenForo before 2.3.7 discloses filesystem paths through exception messages triggered by open_basedir restrictions. This allows an attacker to obtain information about the server's directory structure.
- 9.8 Critical severity
XenForo: Improper Control of Generation of Code
XenForo before 2.3.7 does not properly restrict methods callable from within templates. A loose prefix match was used instead of a stricter first-word match for methods accessible through callbacks and variable method calls in templates, potentially allowing u
- 9.8 Critical severity
XenForo: Improper Authentication
XenForo before 2.3.7 contains a security issue affecting Passkeys that have been added to user accounts. An attacker may be able to compromise the security of Passkey-based authentication.
- 8.8 High severity
XenForo: Incorrect Authorization
XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes. This affects any customer using OAuth2 clients on any version of XenForo 2.3 prior to 2.3.5, potentially allowing client applications to gain access beyond their intended au
- 8.1 High severity
xenforo: Improper Limitation of a Pathname to a Restricted Directory
XenForo before 2.2.14 allows Directory Traversal (with write access) by an authenticated user who has permissions to administer styles, and uses a ZIP archive for Styles Import.