SlimStat Analytics <= 5.3.3 - Unauthenticated Stored Cross-Site Scripting via 'fh' Parameter
Published Jan 9, 2026 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
SlimStat Analytics <= 5.3.3 - Unauthenticated Stored Cross-Site Scripting via 'fh' Parameter
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Jan 9, 2026 · Last refreshed Oct 23, 2026