XSS in Specialk Blackhole For Bad Bots
CVE-2026-4329
The Blackhole for Bad Bots plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the User-Agent HTTP header in all versions up to and including 3.8. This is due to insufficient input sanitization and output escaping. The pl…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (47.0th percentile) — read the EPSS interpretation.
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.
Affected products
- Specialk Blackhole For Bad Bots — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/a71992e2-fdac-4e89-8867-4b771…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/trunk/inc/badbots-registe…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/trunk/inc/badbots-registe…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/trunk/inc/badbots-registe…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/tags/3.8/inc/badbots-regi…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/tags/3.8/inc/badbots-regi…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/tags/3.8/inc/badbots-regi…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/trunk/inc/blackhole-helpe…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/tags/3.8/inc/blackhole-he…
- plugins.trac.wordpress.org/browser/blackhole-bad-bots/trunk/inc/blackhole-core…
Frequently asked questions
- What is CVE-2026-4329?
- CVE-2026-4329 is a high-severity vulnerability in Specialk Blackhole For Bad Bots, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-03-26.
- How severe is CVE-2026-4329?
- High severity. CVSS v3 base score is 7.2 out of 10.