What is CVE-2023-6890?

CVE-2023-6890 is a medium-severity vulnerability in Phpmyfaq, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-12-16.

How severe is CVE-2023-6890?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2023-6890 known to be exploited?

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

XSS in Phpmyfaq

CVE-2023-6890

Cross-site Scripting (XSS) - Stored in GitHub repository thorsten/phpmyfaq prior to 3.1.17.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-12-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Phpmyfaq
Thorsten Thorsten/phpmyfaq — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

huntr.com/bounties/2cf11678-8793-4fa1-b21a-f135564a105d (Exploit, Patch, Third Party Advisory)
github.com/thorsten/phpmyfaq/commit/97d90ebbe11ebc6081bf49a2ba4b60f227cd1b43 (Patch)

Frequently asked questions

What is CVE-2023-6890?: CVE-2023-6890 is a medium-severity vulnerability in Phpmyfaq, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-12-16.
How severe is CVE-2023-6890?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-6890 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.