WordPress security records

WordPress Vulnerability Listing

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

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2 vulnerability records

Medium

Async Javascript <= 2.20.12.09 - Authenticated (Admin+) Cross-Site Scripting

Async JavaScript: Currently marked unpatched

Affected versions: *-2.20.12.09

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

Affected software, patched versions and attribution

The Async Javascript plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '&aj_gtmetrix_username=' and '&aj_gtmetrix_api_key=' parameters in versions up to, and including, 2.20.12.09 due to insufficient input sanitization and output escaping. This makes it possible for authenticated (admin+) attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Async JavaScript

Affected versions: *-2.20.12.09

Patched versions: 2.21.06.29

Researcher credit: R3N0

Applicable copyright and licence notices

This record contains material that is subject to copyright

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: June 13, 2021
CVSS: 5.5

MediumCVE-2020-36854

Async JavaScript <= 2.19.07.14 - Authenticated (Subscriber+) Stored Cross-Site Scripting

Async JavaScript: Currently marked unpatched

Affected versions: [*, 2.20.02.27)

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

Affected software, patched versions and attribution

The Async JavaScript plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.19.07.14. This is due to missing authorization checks on the aj_steps AJAX aciton along with a lack on sanitization on the settings saved via the function. This makes it possible for authenticated attackers with subscriber level permissions and above to inject malicious web scripts into a page that execute whenever a user accesses that page.

Async JavaScript

Affected versions: [*, 2.20.02.27)

Patched versions: 2.20.02.27

Researcher credit: Mikey Veenstra

Applicable copyright and licence notices

This record contains material that is subject to copyright

Licence reference

This record contains material that is subject to copyright

CVE Usage: MITRE 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 Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record

Published: February 27, 2020
CVSS: 6.4

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.