What is CVE-2023-0311?

CVE-2023-0311 is a critical-severity vulnerability in Phpmyfaq, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-01-15.

How severe is CVE-2023-0311?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-0311 known to be exploited?

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

Auth bypass in Phpmyfaq

CVE-2023-0311

Improper Authentication in GitHub repository thorsten/phpmyfaq prior to 3.1.10.

Vulnerability class: Broken Authentication

Published 2023-01-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% 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

Phpmyfaq
Thorsten Thorsten/phpmyfaq — versions unspecified

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

References

huntr.dev/bounties/82b0b629-c56b-4651-af3f-17f749751857 (Permissions Required, Third Party Advisory)
github.com/thorsten/phpmyfaq/commit/fe6e9f02ef1b26a03134b9becda12687ee5f3214 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2023-0311?: CVE-2023-0311 is a critical-severity vulnerability in Phpmyfaq, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-01-15.
How severe is CVE-2023-0311?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-0311 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.