CVE-2021-39349

MEDIUM 4.8CVE-2021-39349 · Published 15/10/2021 · updated 17/06/2026

In short

CVE-2021-39349 is a MEDIUM (CVSS 4.8) vulnerability affecting author bio box (author bio box project).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 66.7% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
author bio box author_bio_box_project	`≤ 3.3.1`	No fix yet

Description

The Author Bio Box WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/includes/admin/class-author-bio-box-admin.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 3.3.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

References

BigTiger2020/word-press · Exploit
plugins.trac.wordpress.org/changeset/2613798/author-bio-box/tags/3.3.2/includes/admin/class-author-bio-box-admin.php · Patch
wordfence.com/vulnerability-advisories · Third Party Advisory

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