Live Vulnerability Intelligence
Threat Database
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Threat Entry
Updated 2026-11-02
Webmention - Security Vulnerability (CVE-2026-111109)
The Webmention plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Open Graph og:title meta tag of a webmention source URL in versions up to, and including, 5.10.1. This is due to insufficient input sanitization: Meta::add_properties() maps og:title to the Item::name property, but Item has no concrete set_name() method, so Item::__call() stores the value raw while sibling set_content()/set_summary() paths route through webmention_sanitize_html(); Item::get_content() then falls back to the raw name when content and summary are empty, and Receiver::process() explicitly removes the core wp_filter_kses / wp_filter_post_kses hooks on pre_comment_content…
PLUGIN
Webmention
CVE-2026-111109
Risk Score
Threat Entry
Updated 2026-07-01
Webmention - Cross-Site Scripting (XSS) (CVE-2026-10513)
The Webmention plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 5.8.0 via parser-derived 'avatar' and 'url' author metadata. This is due to insufficient input sanitization and output escaping on user-supplied MF2 author properties processed by the unauthenticated webmention REST endpoint and rendered directly into HTML 'value' attributes by the edit-comment-form template without esc_attr() or esc_url(). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a privileged user (moderator or administrator) opens the affected comment…
PLUGIN
Webmention
CVE-2026-10513
Risk Score
Threat Entry
Updated 2026-06-17
Webmention - Server-Side Request Forgery (SSRF) (CVE-2026-0688)
The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 via the 'Tools::read' function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
PLUGIN
Webmention
CVE-2026-0688
Risk Score
Threat Entry
Updated 2026-06-17
Webmention - Server-Side Request Forgery (SSRF) (CVE-2026-0686)
The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 in the 'MF2::parse_authorpage' function via the 'Receiver::post' function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
PLUGIN
Webmention
CVE-2026-0686
Risk Score