CVE-2019-9787
WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 38.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 38.56% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-352
- Affected
- wordpress/wordpress
- Source
- cve@mitre.org
EPSS moved from 28.6% on 21 September 2026 to 38.6% on 3 November 2026, peaking at 38.7% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securityfocus.com/bid/107411Third Party Advisory, VDB Entry
- https://blog.ripstech.com/2019/wordpress-csrf-to-rce/Exploit, Third Party Advisory
- https://github.com/WordPress/WordPress/commit/0292de60ec78c5a44956765189403654fe4d080bPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00044.html
- https://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/Release Notes, Vendor Advisory
- https://wordpress.org/support/wordpress-version/version-5-1-1/Release Notes, Vendor Advisory
- https://wpvulndb.com/vulnerabilities/9230
- https://www.debian.org/security/2020/dsa-4677
- http://www.securityfocus.com/bid/107411Third Party Advisory, VDB Entry
- https://blog.ripstech.com/2019/wordpress-csrf-to-rce/Exploit, Third Party Advisory
- https://github.com/WordPress/WordPress/commit/0292de60ec78c5a44956765189403654fe4d080bPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00044.html
- https://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/Release Notes, Vendor Advisory
- https://wordpress.org/support/wordpress-version/version-5-1-1/Release Notes, Vendor Advisory
- https://wpvulndb.com/vulnerabilities/9230
- https://www.debian.org/security/2020/dsa-4677
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.