CVSS 3.1
8.2 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:NCVE-2021-39341
High (8.2) in optinmonster optinmonster. EPSS 22% chance of exploitation in the next 30 days.
The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.
Severity
- EPSS
- 22% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-863, CWE-285, CWE-319
- Published
- Modified
- Record from
- the NVD, synced
Affected
- optinmonster:optinmonster
References
- https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460
- https://wordfence.com/vulnerability-advisories/#CVE-2021-39341
- https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/
- https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460
- https://wordfence.com/vulnerability-advisories/#CVE-2021-39341