What is CVE-2022-3907?

CVE-2022-3907 is a high-severity vulnerability in Clerk.io, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2022-12-05.

How severe is CVE-2022-3907?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2022-3907 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Clerk.io

CVE-2022-3907

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.

Published 2022-12-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Clerk.io
Clerk — versions 0

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/7920c1c1-709d-4b1f-ac08-f0a02ddb329c (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2022-3907?: CVE-2022-3907 is a high-severity vulnerability in Clerk.io, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2022-12-05.
How severe is CVE-2022-3907?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2022-3907 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.