PHP
CVE-2021-39201
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
1DescriptionNVD
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database.
Impact The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post unfiltered_html.
Patches This has been patched in WordPress 5.8, and will be pushed to older versions via minor releases (automatic updates). It's strongly recommended that you keep auto-updates enabled to receive the fix.
References https://wordpress.org/news/category/releases/ https://hackerone.com/reports/1142140
For more information If you have any questions or comments about this advisory: * Open an issue in HackerOne
AnalysisAI
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database.
Impact The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post unfiltered_html.
Patches This has been patched in WordPress 5.8, and will be pushed to older versions via minor releases (automatic updates). It's strongly recommended that you keep auto-updates enabled to receive the fix.
References https://wordpress.org/news/category/releases/ https://hackerone.com/reports/1142140
For more information If you have any questions or comments about this advisory: * Open an issue in HackerOne Affected products include: Wordpress, Debian Debian Linux.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
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External POC / Exploit Code
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