CVE-2026-85599 Grav Shortcode Core before 6.2.5 Stored XSS via unescaped parameters
Attackers with page-edit access can inject malicious scripts via unescaped parameters in Grav Shortcode Core, executing code in visitors' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-85599?
CVE-2026-85599 is a medium-severity cross-site scripting vulnerability in getgrav grav-plugin-shortcode-core, published on 4 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Grav Shortcode Core before 6.2.5 contains stored cross-site scripting vulnerabilities in the [lorem] tag parameter and [details] summary parameter that are written to rendered pages without escaping. Attackers with page-edit access can inject arbitrary HTML and JavaScript that executes in the browsers of all page visitors, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-85599?
How do I fix CVE-2026-85599?
No fix has been published for CVE-2026-85599 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-2026-85599 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85599 exists.
Sources
Also known as GHSA-5xgg-wmqq-qr2g.