What is CVE-2025-13839?

CVE-2025-13839 is a medium-severity vulnerability in Jenyay Ljusers, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-12-12.

How severe is CVE-2025-13839?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Jenyay Ljusers

CVE-2025-13839

The LJUsers plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name' parameter of the 'ljuser' shortcode in all versions up to, and including, 1.2.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Jenyay Ljusers — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-13839?: CVE-2025-13839 is a medium-severity vulnerability in Jenyay Ljusers, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-12-12.
How severe is CVE-2025-13839?: Medium severity. CVSS v3 base score is 6.4 out of 10.