CVE-2025-11276 Rebuild Comment/Guestbook cross site scripting
Remote attackers can inject malicious scripts into the Comment/Guestbook feature of Rebuild, potentially leading to code execution or account takeover.
- 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-2025-11276?
CVE-2025-11276 is a medium-severity cross-site scripting vulnerability in Rebuild, published on 5 Oct 2025. 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 security flaw has been discovered in Rebuild up to 4.1.3. Affected by this issue is some unknown functionality of the component Comment/Guestbook. Performing manipulation results in cross site scripting. It is possible to initiate the attack remotely. Upgrading to version 4.1.4 can resolve this issue. It is suggested to upgrade the affected component. According to the researcher the vendor has confirmed the flaw and fix in a private issue response.
Which versions are affected by CVE-2025-11276?
How do I fix CVE-2025-11276?
No fix has been published for CVE-2025-11276 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-2025-11276 being exploited?
There is no known exploitation of CVE-2025-11276 in the wild and no public exploit code.
Sources
Also known as GHSA-23xc-wwgh-93wr.