CVE-2026-12202 Intelliants Subrion CMS Blocks Endpoint cross site scripting
Remote attackers can inject malicious scripts via the Blocks Endpoint CSS class name in Subrion CMS, potentially leading to code execution or account takeover.
- 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-2026-12202?
CVE-2026-12202 is a medium-severity cross-site scripting vulnerability in Intelliants Subrion CMS, published on 15 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
A vulnerability has been found in Intelliants Subrion CMS up to 4.0.3. Affected by this issue is some unknown functionality of the component Blocks Endpoint. Such manipulation of the argument CSS class name leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-12202?
2 open source packages ship an affected version, including intelliants/subrion.
| Package | Affected | Fixed in |
|---|---|---|
intelliants/subrion Packagist | All versions to 4.0.3 | None |
intelliants/subrion Packagist | All versions to 4.0.3 | None |
How do I fix CVE-2026-12202?
No fix has been published for CVE-2026-12202 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-2026-12202 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12202 exists.
Sources
Also known as GHSA-wrcg-234w-hfhq.