CVE-2025-15057 SlimStat Analytics <= 5.3.3 - Unauthenticated Stored Cross-Site Scripting via 'fh' Parameter
Unauthenticated attackers can inject scripts via the fingerprint parameter, executing code when administrators view logs, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-15057?
CVE-2025-15057 is a high-severity cross-site scripting vulnerability in veronalabs SlimStat Analytics, published on 9 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `fh` (fingerprint) parameter in all versions up to, and including, 5.3.3. This is due to insufficient input sanitization and output escaping on the fingerprint value stored in the database. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator views the Real-time Access Log report.
Weakness: CWE-79
Which versions are affected by CVE-2025-15057?
How do I fix CVE-2025-15057?
No fix has been published for CVE-2025-15057 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-2025-15057 being exploited?
There is no known exploitation of CVE-2025-15057 in the wild and no public exploit code.
Sources
Also known as GHSA-gwjq-2874-69h8.