CVE-2021-29447
A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 85.7%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 85.72% probability · 100th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- wordpress/wordpress · debian/debian linux
- Source
- security-advisories@github.com
References
- http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.htmlExploit, Third Party Advisory, VDB Entry
- https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/Exploit, Third Party Advisory
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhhThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00017.htmlMailing List, Third Party Advisory
- https://wordpress.org/news/category/security/Release Notes, Vendor Advisory
- https://www.debian.org/security/2021/dsa-4896Third Party Advisory
- http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.htmlExploit, Third Party Advisory, VDB Entry
- https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/Exploit, Third Party Advisory
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhhThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00017.htmlMailing List, Third Party Advisory
- https://wordpress.org/news/category/security/Release Notes, Vendor Advisory
- https://www.debian.org/security/2021/dsa-4896Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.