What is CVE-2021-39341?

CVE-2021-39341 is a high-severity vulnerability in Optinmonster, classified under Improper Authorization. CVSS score: 8.2/10. Published 2021-11-01.

How severe is CVE-2021-39341?

High severity. CVSS v3 base score is 8.2 out of 10.

Is CVE-2021-39341 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Optinmonster

CVE-2021-39341

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.

EPSS: 0.219 (97.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Optinmonster — versions 2.6.4

Weakness classification (CWE)

Public proof-of-concept exploits

References

security@wordfence.com (Exploit, Third Party Advisory, x_refsource_MISC)
security@wordfence.com (Third Party Advisory, x_refsource_MISC)
security@wordfence.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-39341?: CVE-2021-39341 is a high-severity vulnerability in Optinmonster, classified under Improper Authorization. CVSS score: 8.2/10. Published 2021-11-01.
How severe is CVE-2021-39341?: High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2021-39341 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.