Webmention
Monthly
Stored cross-site scripting in the Webmention WordPress plugin (versions up to and including 5.8.0) lets unauthenticated attackers persist malicious script through the public webmention REST endpoint, which a moderator or administrator then triggers simply by opening the affected comment's edit screen. Attacker-controlled MF2 'avatar' and 'url' author properties are stored and later echoed unescaped into HTML 'value' attributes, yielding script execution in a privileged admin session. No public exploit identified at time of analysis, and no EPSS or CISA KEV signal is present in the provided data.
Server-Side Request Forgery (SSRF) in WordPress Webmention plugin versions ≤5.6.2 allows unauthenticated remote attackers to force the web server to make arbitrary HTTP requests to internal or external systems. The vulnerability exists in the MF2::parse_authorpage function called through Receiver::post, enabling attackers to probe internal network services, exfiltrate data from cloud metadata endpoints, or modify internal resources. EPSS data not provided; no CISA KEV status indicating confirmed active exploitation at time of analysis. Public exploit code exists (proof-of-concept references available via Wordfence and WordPress plugin repository).
Stored cross-site scripting in the Webmention plugin for WordPress (versions up to and including 5.10.1) lets an unauthenticated attacker place script inside the og:title meta tag of a source URL and submit it as a webmention, which is then persisted verbatim into the target post's comment content. Execution is gated on an administrator approving the resulting pending comment, after which the script runs for any user who views the injected page; no public exploit code was identified at time of analysis, and the vendor has released 5.10.2 as the fix.
Server-Side Request Forgery in Webmention plugin for WordPress (versions up to 5.6.2) allows authenticated attackers with Subscriber-level access to make arbitrary web requests from the affected server via the Tools::read function, enabling reconnaissance and potential modification of internal services. EPSS score of 6.4 reflects moderate real-world exploitability risk given the low privilege requirement and network-accessible attack vector, though exploitation requires valid WordPress authentication.
Stored cross-site scripting in the Webmention WordPress plugin (versions up to and including 5.8.0) lets unauthenticated attackers persist malicious script through the public webmention REST endpoint, which a moderator or administrator then triggers simply by opening the affected comment's edit screen. Attacker-controlled MF2 'avatar' and 'url' author properties are stored and later echoed unescaped into HTML 'value' attributes, yielding script execution in a privileged admin session. No public exploit identified at time of analysis, and no EPSS or CISA KEV signal is present in the provided data.
Server-Side Request Forgery (SSRF) in WordPress Webmention plugin versions ≤5.6.2 allows unauthenticated remote attackers to force the web server to make arbitrary HTTP requests to internal or external systems. The vulnerability exists in the MF2::parse_authorpage function called through Receiver::post, enabling attackers to probe internal network services, exfiltrate data from cloud metadata endpoints, or modify internal resources. EPSS data not provided; no CISA KEV status indicating confirmed active exploitation at time of analysis. Public exploit code exists (proof-of-concept references available via Wordfence and WordPress plugin repository).
Stored cross-site scripting in the Webmention plugin for WordPress (versions up to and including 5.10.1) lets an unauthenticated attacker place script inside the og:title meta tag of a source URL and submit it as a webmention, which is then persisted verbatim into the target post's comment content. Execution is gated on an administrator approving the resulting pending comment, after which the script runs for any user who views the injected page; no public exploit code was identified at time of analysis, and the vendor has released 5.10.2 as the fix.
Server-Side Request Forgery in Webmention plugin for WordPress (versions up to 5.6.2) allows authenticated attackers with Subscriber-level access to make arbitrary web requests from the affected server via the Tools::read function, enabling reconnaissance and potential modification of internal services. EPSS score of 6.4 reflects moderate real-world exploitability risk given the low privilege requirement and network-accessible attack vector, though exploitation requires valid WordPress authentication.