What is CVE-2024-4439?

CVE-2024-4439 is a high-severity vulnerability in WordPress, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.2/10. Published 2024-05-03.

How severe is CVE-2024-4439?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2024-4439 known to be exploited?

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

XSS in WordPress

CVE-2024-4439

WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in various versions up to 6.5.2 due to insufficient output escaping on the display name. 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. In addition, it also makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that have the comment block present and display the comment author's avatar.

Published 2024-05-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.710 (99.4th percentile), scored 2026-10-17.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.710 · newest: 0.710 · change: 0.000

Affected products

WordPress
WordPress Foundation — versions 6.0, 6.1, 6.2

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Public proof-of-concept exploits

References

www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff… (Third Party Advisory)
wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/ (Vendor Advisory)
core.trac.wordpress.org/changeset (Patch)
core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/ava… (Patch)
www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vuln… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-4439?: CVE-2024-4439 is a high-severity vulnerability in WordPress, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.2/10. Published 2024-05-03.
How severe is CVE-2024-4439?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2024-4439 known to be exploited?: 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.