CVE-2026-12592 SlimStat Analytics < 5.5.0 - Unauthenticated Stored XSS via CF-IPCountry Header
Unauthenticated attackers can inject scripts via headers that execute in admin browsers, potentially leading to account takeover.
- 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-2026-12592?
CVE-2026-12592 is a high-severity cross-site scripting vulnerability in Unknown SlimStat Analytics, published on 20 Jul 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
The SlimStat Analytics WordPress plugin before 5.5.0 does not escape a visitor-controlled geolocation value before outputting it in its admin analytics reports, allowing unauthenticated visitors to store a cross-site scripting payload that executes in the browser of an administrator who views the reports. Exploitation requires the SlimStat Analytics WordPress plugin before 5.5.0 to be configured to use the Cloudflare geolocation provider.
Weakness: CWE-79
Which versions are affected by CVE-2026-12592?
How do I fix CVE-2026-12592?
No fix has been published for CVE-2026-12592 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-2026-12592 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12592 exists.
Sources
Also known as GHSA-m3j2-94qc-pfvg.