CVE-2020-28039

is_protected_meta in wp-includes/meta.php in WordPress before 5.5.2 allows arbitrary file deletion because it does not properly determine whether a meta key is considered protected.

• https://github.com/WordPress/wordpress-develop/commit/d5ddd6d4be1bc9fd16b7796842e6fb26315705adPatch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2020/11/msg00004.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
• https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/Release Notes, Vendor Advisory
• https://wpscan.com/vulnerability/10452Third Party Advisory
• https://www.debian.org/security/2020/dsa-4784Third Party Advisory
• https://github.com/WordPress/wordpress-develop/commit/d5ddd6d4be1bc9fd16b7796842e6fb26315705adPatch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2020/11/msg00004.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
• https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/Release Notes, Vendor Advisory
• https://wpscan.com/vulnerability/10452Third Party Advisory
• https://www.debian.org/security/2020/dsa-4784Third Party Advisory

Published

Nov 2, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-28033WordPress before 5.5.2 mishandles embeds from disabled sites…7.5
• CVE-2020-28034WordPress before 5.5.2 allows XSS associated with global var…6.1
• CVE-2020-28035WordPress before 5.5.2 allows attackers to gain privileges v…9.8
• CVE-2020-28036wp-includes/class-wp-xmlrpc-server.php in WordPress before 5…9.8
• CVE-2020-28037is_blog_installed in wp-includes/functions.php in WordPress …9.8
• CVE-2020-28038WordPress before 5.5.2 allows stored XSS via post slugs.6.1
• CVE-2020-2804Vulnerability in the MySQL Server product of Oracle MySQL (c…5.9
• CVE-2020-28040WordPress before 5.5.2 allows CSRF attacks that change a the…4.3
• CVE-2020-28041The SIP ALG implementation on NETGEAR Nighthawk R7000 1.0.9.…6.5
• CVE-2020-28042ServiceStack before 5.9.2 mishandles JWT signature verificat…5.3
• CVE-2020-28043MISP through 2.4.133 allows SSRF in the REST client via the …7.5
• CVE-2020-28044An attacker with physical access to a PAX Point Of Sale devi…6.8