CVE-2021-39325

OptinMonster <= 2.6.0 Reflected Cross-Site Scripting

Description

The OptinMonster WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to insufficient input validation in the load_previews function found in the ~/OMAPI/Output.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.6.0.

Remediation

Solution:

  • Update to version 2.6.1 or newer.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.19%
Third-Party Advisory wordpress.org Third-Party Advisory wordfence.com
Affected: OptinMonster OptinMonster
Published at:
Updated at:

References

Link Tags
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39325 third party advisory
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2595758%40optinmonster&new=2595758%40optinmonster&sfp_email=&sfph_mail=#file2 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-39325?
CVE-2021-39325 has been scored as a medium severity vulnerability.
How to fix CVE-2021-39325?
To fix CVE-2021-39325: Update to version 2.6.1 or newer.
Is CVE-2021-39325 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39325 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39325?
CVE-2021-39325 affects OptinMonster OptinMonster.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.