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Plugin 6 known issues Latest disclosed Apr 09, 2026

Perfmatters Vulnerabilities

Review known vulnerability records for the WordPress plugin Perfmatters (`perfmatters`), including severity, CVE references, affected versions, and patch status.

Recent tracked CVEs on this page include CVE-2026-4351, CVE-2026-4350 and CVE-2023-47876, so operators can jump from disclosure to patch validation without scanning the full feed first.

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Known Records
6
High or Critical
2
Patch Coverage
100%
Last Updated
Apr 09, 2026
Coverage Snapshot

What this page helps you verify fast

This hub clusters every indexed record for Perfmatters so operators can confirm whether a disclosed issue maps to the installed slug, version range, and patch path.

Patch Visibility
6 records include a published patch path, leaving 0 with no listed safe release yet.
Severity Mix
0 critical and 2 high severity findings.
Recent CVEs
CVE-2026-4351, CVE-2026-4350 and CVE-2023-47876
Reference Workflow
Jump from the hub into the full report when you need remediation notes, exploit context, CVSS vectors, or source references.
Triage First

Open the records most likely to drive action

These recent records surface the CVE strings, patch cues, and direct report links most operators need first.

Known Vulnerabilities

Reports for Perfmatters

Sorted by latest disclosure date so newly published issues surface first.

Plugin High Patched: Yes CVE-2026-4351
Perfmatters <= 2.5.9 - Authenticated (Subscriber+) Arbitrary File Overwrite via 'snippets' Parameter

The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the `PMCS::action_handler()` method processing the bulk action `activate`/`deactivate` handlers without any authorization...

Published
Apr 09, 2026
Patched Release
2.6.0
Affected Versions
Versions up to 2.5.9
Next Step
Update to 2.6.0 or newer if supported.
Open Full Report Open CVE Reference
Plugin High Patched: Yes CVE-2026-4350
Perfmatters <= 2.5.9.1 - Authenticated (Subscriber+) Arbitrary File Deletion via 'delete' Parameter

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 ch...

Published
Apr 02, 2026
Patched Release
2.6.0
Affected Versions
Versions up to 2.5.9.1
Next Step
Update to 2.6.0 or newer if supported.
Open Full Report Open CVE Reference
Plugin Medium Patched: Yes CVE-2023-47876
Perfmatters <= 2.1.6 - Reflected Cross-Site Scripting

The Perfmatters plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via an unknown parameter in all versions up to, and including, 2.1.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arb...

Published
Nov 21, 2023
Patched Release
2.1.7
Affected Versions
Versions up to 2.1.6
Next Step
Update to 2.1.7 or newer if supported.
Open Full Report Open CVE Reference
Plugin Medium Patched: Yes CVE-2023-47875
Perfmatters <= 2.1.6 - Cross-Site Request Forgery

The Perfmatters plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.1.6. This is due to missing or incorrect nonce validation on an unknown function. This makes it possible for unauthenticated attackers to perform an unknown ac...

Published
Nov 21, 2023
Patched Release
2.1.7
Affected Versions
Versions up to 2.1.6
Next Step
Update to 2.1.7 or newer if supported.
Open Full Report Open CVE Reference
Plugin Medium Patched: Yes CVE-2023-47877
Perfmatters < 2.2.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting

The Perfmatters plugin for WordPress is vulnerable to Stored Cross-Site Scripting via an unknown parameter in all versions up to 2.2.0 (exclusive) due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber acces...

Published
Nov 21, 2023
Patched Release
2.2.0
Affected Versions
Versions before 2.2.0
Next Step
Update to 2.2.0 or newer if supported.
Open Full Report Open CVE Reference
Plugin Medium Patched: Yes CVE-2023-47874
Perfmatters <= 2.1.6 - Missing Authorization

The Perfmatters plugin for WordPress is vulnerable to unauthorized access, modification or loss of data due to a missing capability check on one of its functions in all versions up to, and including, 2.1.6. This makes it possible for subscriber-level attackers to invoke this func...

Published
Nov 20, 2023
Patched Release
2.1.7
Affected Versions
Versions up to 2.1.6
Next Step
Update to 2.1.7 or newer if supported.
Open Full Report Open CVE Reference