What is CVE-2020-23263?

CVE-2020-23263 is a medium-severity vulnerability in Fork-Cms Fork Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-06.

How severe is CVE-2020-23263?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Fork-Cms Fork Cms

CVE-2020-23263

Persistent Cross-site scripting vulnerability on Fork CMS version 5.8.2 allows remote attackers to inject arbitrary Javascript code via the "navigation_title" parameter and the "title" parameter in /private/en/pages/add.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-05-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Fork-Cms Fork Cms — versions 5.8.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/forkcms/forkcms/pull/3093 (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-23263?: CVE-2020-23263 is a medium-severity vulnerability in Fork-Cms Fork Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-06.
How severe is CVE-2020-23263?: Medium severity. CVSS v3 base score is 6.1 out of 10.