CVE-2026-11511 Bolt CMS HTML Attribute TextType.php HTML injection
Remote attackers can inject HTML via the style argument in Bolt CMS, potentially leading to script execution or security bypasses.
- 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-2026-11511?
CVE-2026-11511 is a medium-severity cross-site scripting vulnerability in Bolt CMS, published on 8 Jun 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
A weakness has been identified in Bolt CMS up to 3.7.5. This vulnerability affects unknown code of the file src/Storage/Field/Type/TextType.php of the component HTML Attribute Handler. Executing a manipulation of the argument style can lead to HTML injection. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The GitHub repository was archived by the owner and is now read-only. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2026-11511?
How do I fix CVE-2026-11511?
No fix has been published for CVE-2026-11511 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-2026-11511 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11511 exists.
Sources
Also known as GHSA-wr9m-77f5-2xp5.