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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.

PUBLISHED Reserved 2025-12-23 | Published 2026-01-09 | Updated 2026-01-09 | Assigner Wordfence




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-12-23:Discovered
2025-12-23:Vendor Notified
2026-01-08:Disclosed

Credits

Supakiad S. finder

References

www.wordfence.com/...-1362-466b-b14b-4714087f556b?source=cve

plugins.trac.wordpress.org/changeset/3428488/wp-slimstat

cve.org (CVE-2025-15057)

nvd.nist.gov (CVE-2025-15057)

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