WordPress security changelog
HIGH CVE-2024-4439 Analyzed

the Avatar block in various: Cross-site scripting

the Avatar block in various is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed.

CVE / CNA score 7.2 CVSS 3.1 · security@wordfence.com
NVD score 6.1 CVSS 3.1 · nvd@nist.gov
Component
the Avatar block in various
Plugin slug
Core
Affected
See vendor advisory
Safe version
See mitigation notes
Published
May 03, 2024
Weakness
CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

This CVE was published May 03, 2024 and is one of 45 known issues for WordPress core.

What to do

Patch or disable the affected component.

Update the Avatar block in various to a release outside the affected range, or disable and remove it until a fixed version is available.

Source record

Technical description

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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

NVD vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Primary and upstream sources