What is CVE-2025-13311?

CVE-2025-13311 is a medium-severity vulnerability in Sigalitam Just Highlight, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-11-25.

How severe is CVE-2025-13311?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Sigalitam Just Highlight

CVE-2025-13311

The Just Highlight plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Highlight Color' setting in all versions up to, and including, 1.0.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the plugin's settings page.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (11.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Sigalitam Just Highlight — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-13311?: CVE-2025-13311 is a medium-severity vulnerability in Sigalitam Just Highlight, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-11-25.
How severe is CVE-2025-13311?: Medium severity. CVSS v3 base score is 4.4 out of 10.