CVE-2026-84931 Joli Table Of Contents < 3.0.3 - Author+ Stored XSS via joli-toc Shortcode Theme Attribute
Authors can inject JavaScript via shortcode attributes, leading to code execution in administrators' browsers and potential privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84931?
CVE-2026-84931 is a medium-severity cross-site scripting vulnerability in Unknown Joli Table Of Contents, published on 5 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Joli Table Of Contents WordPress plugin before 3.0.3 does not sanitise or escape a shortcode attribute value before outputting it inside an HTML element's attribute, allowing users with the Author role and above to inject arbitrary HTML attributes and JavaScript that execute in the browser of any user who views the post, including higher-privileged users such as administrators. This crosses a privilege boundary even on multisite, where such users are not permitted to post unfiltered HTML.
Weakness: CWE-79
Which versions are affected by CVE-2026-84931?
How do I fix CVE-2026-84931?
No fix has been published for CVE-2026-84931 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-84931 being exploited?
There is no known exploitation of CVE-2026-84931 in the wild and no public exploit code.
Sources
Also known as GHSA-m8wm-hf9g-3f6p.