OptinMonster <= 2.6.4 Unprotected REST-API Endpoints
CVE-2021-39341

8.2HIGH

Key Information:

Vendor

WordPress
Status
Optinmonster
Vendor
CVE Published:
1 November 2021

What is 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.

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Deploy the Patch

Affected Version(s)

OptinMonster 2.6.4

References

https://www.wordfence.com/blog/2021/10/1000000-sites-affe...
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https://wordfence.com/vulnerability-advisories/#CVE-2021-...
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https://plugins.trac.wordpress.org/browser/optinmonster/t...
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EPSS Score

44% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Chloe Chamberland, Wordfence
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