CVE-2026-88418 Cross-site request forgery in n/a
An attacker can exploit disabled CSRF protection to inject malicious scripts into admin content, leading to persistent remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-88418?
CVE-2026-88418 is a high-severity vulnerability in n/a, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
CMSimple 5.24 ships with CSRF protection disabled by default, which turns csrfProtection() into a no-op on every state-changing admin request, and it does not send the csrf_token hidden field in admin forms. Because administrator authentication is cookie-only and no CSRF token is enforced, an unauthenticated attacker can induce a logged-in administrator's browser to issue a forged content-save request with a text payload containing a scripting marker. The marker is stored verbatim into content/content.php; on every subsequent page view evaluate_cmsimple_scripting() (functions.php) executes the marker body with PHP eval() — for all visitors, including unauthenticated ones. This yields persistent remote code execution on the web server.
Weakness: CWE-352
Which versions are affected by CVE-2026-88418?
How do I fix CVE-2026-88418?
No fix has been published for CVE-2026-88418 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-88418 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88418 exists.
Sources
Also known as GHSA-7jc4-6qrv-4984.