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WordPress security records

WordPress Vulnerability Listing

Filter Production Feed records and inspect affected software, version ranges, severity, patch information and source attribution without opening separate UUID pages.

Dataset last synchronized: 2026-08-03 00:31:25 UTC

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3 vulnerability records

Critical

Captcha 4.3.6 - 4.4.4 - Plugin Backdoor

Captcha: Currently marked unpatched

Affected versions: 4.3.6-4.4.4

Vulnerability type: CWE-912 Hidden Functionality

Affected software, patched versions and attribution

The Captcha plugin for WordPress contained a backdoor that injected SEO spam into unsuspecting users WordPress sites in version 4.3.6 to 4.4.4.

Captcha

Affected versions: 4.3.6-4.4.4

Patched versions: 4.4.5

Researcher credit: Matt Barry

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
December 19, 2017
CVSS
9.6
Medium

Captcha < 4.3.0 - Reflected Cross-Site Scripting

Captcha: Currently marked unpatched

Affected versions: [*, 4.3.0)

Vulnerability type: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected software, patched versions and attribution

The Captcha plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘category’ parameter in versions before 4.3.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Captcha

Affected versions: [*, 4.3.0)

Patched versions: 4.3.0

Researcher credit: Neven Birusk

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
April 12, 2017
CVSS
6.1
Medium

Captcha <= 3.8.1 - Captcha Bypass

Captcha: Currently marked unpatched

Affected versions: *-3.8.1

Vulnerability type: CWE-804 Guessable CAPTCHA

Affected software, patched versions and attribution

The Captcha plugin for WordPress is vulnerable to captcha bypass in versions up to, and including, 3.8.1.

Captcha

Affected versions: *-3.8.1

Patched versions: 3.8.2

Researcher credit: cervoise

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
August 1, 2014
CVSS
5.3

Vulnerability data: Wordfence Intelligence. Analysis and practical guidance: 3Zero Digital.

Data Source, Attribution and Methodology

Production Feed records are aggregated without claiming discovery, exploitation or infection. Applicable source notices remain attached to individual records. Read the methodology.