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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).
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).
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.