CVE-2026-52307 Cross-site scripting in n/a
Authenticated attackers can execute arbitrary scripts via stored XSS in the Column Management title field of ClassCMS.
- 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-2026-52307?
CVE-2026-52307 is a medium-severity cross-site scripting vulnerability in n/a, published on 8 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
An authenticated stored cross-site scripting (XSS) vulnerability in the Column Management component of ClassCMS 1CMS v5.6 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the title field.
Weakness: CWE-79
Which versions are affected by CVE-2026-52307?
How do I fix CVE-2026-52307?
No fix has been published for CVE-2026-52307 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-2026-52307 being exploited?
There is no known exploitation of CVE-2026-52307 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-m5p6-p4r7-5mqx.