EUVD-2026-35312
GHSA-46cx-5vwq-g5q3
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The jQuery Hover Footnotes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Footnote Qualifier ('{{...}}' Syntax) in all versions up to, and including, 1.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The attribute-breakout payload (e.g., a double-quote followed by an event handler) contains no angle brackets and therefore bypasses WordPress core's wp_kses_post() filtering, which only strips disallowed HTML tags rather than sanitizing attribute contexts.
AnalysisAI
{{...}}). The attack exploits an attribute-breakout technique - a double-quote followed by an event handler - that contains no angle brackets and therefore evades WordPress core's wp_kses_post() filter, which only strips disallowed HTML tags rather than sanitizing attribute injection contexts. The changed scope (S:C in the CVSS vector) means injected scripts execute in any victim's browser upon visiting a page containing the malicious footnote, enabling session theft, credential harvesting, or defacement at scale across site visitors. No public exploit code or CISA KEV listing has been identified at time of analysis.
Technical ContextAI
The vulnerability resides in the jQuery Hover Footnotes WordPress plugin (CPE: cpe:2.3:a:weaverlancegmailcom:jquery_hover_footnotes:*:*:*:*:*:*:*:*), specifically in the footnote processing logic within jqFootnotes.php at lines 213, 222, 235, and 246 as identified by Wordfence researchers. The plugin parses content enclosed in the {{...}} qualifier syntax to render hover-activated footnotes. CWE-79 (Improper Neutralization of Input During Web Page Generation) is the root cause: user-supplied content within the qualifier is written into an HTML attribute context without proper escaping of double-quotes or event handler injection. WordPress's wp_kses_post() is a tag-allowlist filter - it removes or strips disallowed HTML elements and their attributes but is not designed to sanitize attribute-value contexts where content is injected inside an already-permitted attribute. An attacker can break out of the attribute boundary using a double-quote character and append an arbitrary event handler (e.g., onmouseover=alert(1)), yielding a payload that contains no angle brackets and passes wp_kses_post() unmodified before being rendered into the DOM.
RemediationAI
No vendor-released patched version has been identified in the available intelligence data; the Wordfence advisory and WordPress plugin repository references do not confirm a fixed release at time of analysis. Site administrators should check the WordPress Plugin Directory and the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/b02bdf2a-1d99-4cc3-8f75-822ff0792e44?source=cve for an updated version before upgrading. As an immediate compensating control, disable or deactivate the jQuery Hover Footnotes plugin entirely until a patched release is available - this eliminates the attack surface with no side effects beyond loss of hover footnote functionality. If the plugin must remain active, restrict the WordPress author role assignments to the minimum necessary set of trusted users, since the vulnerability requires at minimum author-level access; demoting or removing untrusted author accounts limits exploitation opportunity. Additionally, implement a Web Application Firewall rule to detect and block double-quote-plus-event-handler patterns (e.g., "+on\w+=") in POST bodies targeting the WordPress editor endpoint, though this is a heuristic control that may produce false positives on legitimate content.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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