CVE-2019-9787
HIGH severity · CVSS 8.8 · Cross-site request forgery (CSRF)
8.8CVSS HIGH
Summary
WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)81%
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/WordPress/WordPress/commit/0292de60ec78c5a44956765189403654fe4d080b ↗
Additional information
- NVD record
- https://github.com/WordPress/WordPress/commit/0292de60ec78c5a44956765189403654fe4d080bPatch
- https://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/Advisory
- https://wordpress.org/support/wordpress-version/version-5-1-1/Advisory
- http://www.securityfocus.com/bid/107411Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00044.html
- https://wpvulndb.com/vulnerabilities/9230
- https://www.debian.org/security/2020/dsa-4677
- https://blog.ripstech.com/2019/wordpress-csrf-to-rce/Advisory