TI-2026-11255 Aliases CVE-2026-13251 GHSA-8456-6w7p-xg3h

Perfmatters <= 2.6.4 - Unauthenticated Arbitrary File Read via 's' Parameter

MEDIUM 41CWE-22Published 2026-07-02 · Updated 2026-07-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

The Perfmatters plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.6.4 via the 's' parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. Exploitation requires the Local Google Fonts feature to be enabled (disabled by default), pretty permalinks to be active, and RSS feed links to remain enabled in the plugin settings.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00941 61st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Perfmatters	Perfmatters	up to 2.6.4	—	No fix listed	CNA

Perfmatters VendorPerfmatters Affected up to 2.6.4 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:perfmatters:perfmatters::::::::	—	—	Perfmatters

cpe:2.3:a:perfmatters:perfmatters:*:*:*:*:*:*:*:* Versions — — ·Perfmatters

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-13251
2026-10-03 Alias added: GHSA-8456-6w7p-xg3h

References

Other 3

TI-2023-25978 WordPress Perfmatters Plugin <= 2.1.6 is vulnerable to Broken Access Control CVSS 3.1HIGH 8.8
TI-2026-03786 Perfmatters <= 2.5.9.1 - Authenticated (Subscriber+) Arbitrary File Deletion via 'delete' Parameter CVSS 3.1HIGH 8.1
TI-2023-25979 WordPress Perfmatters Plugin <= 2.1.6 is vulnerable to Cross Site Request Forgery (CSRF) CVSS 3.1HIGH 8.8
TI-2026-03787 Perfmatters <= 2.5.9 - Authenticated (Subscriber+) Arbitrary File Overwrite via 'snippets' Parameter CVSS 3.1HIGH 8.1
TI-2026-41495 WordPress perfmatters plugin <= 2.6.4 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
TI-2023-25980 WordPress Perfmatters Plugin <= 2.1.6 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1HIGH 7.1

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences