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CVE

CWE

Training

CVE-2021-39341

Published: Nov 1, 2021

Modified: Mar 31, 2025

PUBLISHED

CVSS v3.1

8.2

HIGH

Description

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.

Vendor	Product	Versions
OptinMonster	OptinMonster	affected `2.6.4 - <= 2.6.4`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

References

https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/

x_refsource_MISC

https://wordfence.com/vulnerability-advisories/#CVE-2021-39341

x_refsource_MISC

https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460

x_refsource_MISC

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