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CVE-2023-6391: custom user css vulnerability
CVE-2023-6391: high vulnerability affecting custom user css. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 8.8 HIGH
- EPSS
- 27.43%
- Known exploited
- not in KEV
- Product
- custom user css
What is known
The Custom User CSS WordPress plugin through 0.2 does not have CSRF check in place when updating its settings, which could allow attackers to make a logged in admin change them via a CSRF attack.
Business impact
Successful exploitation of CVE-2023-6391, a high vulnerability (CVSS 8.8) affecting custom user css, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.
Recommended administrator action
Confirm whether custom user css is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.