Vulnerability Description
In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does require an admin to upload the theme, and is low severity self-XSS. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wordpress | Wordpress | >= 3.7, < 3.7.34 |
| Fedoraproject | Fedora | 31 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://github.com/WordPress/wordpress-develop/commit/404f397b4012fd9d382e55bf7dPatchThird Party Advisory
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-87h4-phjThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00000.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00011.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-releVendor Advisory
- https://www.debian.org/security/2020/dsa-4709Third Party Advisory
- https://github.com/WordPress/wordpress-develop/commit/404f397b4012fd9d382e55bf7dPatchThird Party Advisory
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-87h4-phjThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00000.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00011.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-releVendor Advisory
FAQ
What is CVE-2020-4049?
CVE-2020-4049 is a vulnerability with a CVSS score of 2.4 (LOW). In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does requir...
How severe is CVE-2020-4049?
CVE-2020-4049 has been rated LOW with a CVSS base score of 2.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-4049?
Check the references section above for vendor advisories and patch information. Affected products include: Wordpress Wordpress, Fedoraproject Fedora, Debian Debian Linux.