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TI-2026-03786 Aliases CVE-2026-4350GHSA-7hmf-75fm-xr24

Perfmatters <= 2.5.9.1 - Authenticated (Subscriber+) Arbitrary File Deletion via 'delete' Parameter

Priority LOW 38CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The Perfmatters plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in all versions up to, and including, 2.5.9.1. This is due to the `PMCS::action_handler()` method processing the `$_GET['delete']` parameter without any sanitization, authorization check, or nonce verification. The unsanitized filename is concatenated with the storage directory path and passed to `unlink()`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary files on the server by using `../` path traversal sequences, including `wp-config.php` which would force WordPress into the installation wizard and allow full site takeover.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0067 52nd 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
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
PerfmattersPerfmattersup to 2.5.9.1—No fix listedCNA
  • Perfmatters VendorPerfmatters Affected up to 2.5.9.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
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

  1. 2026-10-02 Threatist record created from CVE-2026-4350
  2. 2026-10-03 Alias added: GHSA-7hmf-75fm-xr24
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 2

  • TI-2026-11255 Perfmatters <= 2.6.4 - Unauthenticated Arbitrary File Read via 's' Parameter CVSS 3.1HIGH 7.5
  • TI-2023-25978 WordPress Perfmatters Plugin <= 2.1.6 is vulnerable to Broken Access Control CVSS 3.1HIGH 8.8
  • 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