TI-2022-03583 Aliases CVE-2022-3907 GHSA-rrvm-94fq-4hmv

Clerk < 4.0.0 - Authentication Bypass and API Keys Disclosure

HIGH 72CWE-203Published 2022-12-05 · Updated 2025-04-23

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: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-203.

Summary

The Clerk WordPress plugin before 4.0.0 is affected by time-based attacks in the validation function for all API requests due to the usage of comparison operators to verify API keys against the ones stored in the site options.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00944 61st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix Fixed Clerk (Unknown): 4.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
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
Unknown	Clerk	before 4.0.0	4.0.0	Patch available	CNA

Clerk VendorUnknown Affected before 4.0.0 Fixed in 4.0.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:clerk.io:clerk.io::::::wordpress::*	before 4.0.0	Vulnerable	Clerk.io

cpe:2.3:a:clerk.io:clerk.io:*:*:*:*:*:wordpress:*:* Versions before 4.0.0 Vulnerable ·Clerk.io

Remediation

Fix · CNA Clerk (Unknown) Fixed in 4.0.0

Timeline

2026-10-02 Threatist record created from CVE-2022-3907
2026-10-03 Alias added: GHSA-rrvm-94fq-4hmv

References

Exploit 1

https://wpscan.com/vulnerability/7920c1c1-709d-4b1f-ac08-f0a02ddb329c

Sources

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