CVE-2020-35125

Name: CVE-2020-35125
Creator: NVD / NIST
Published: 2021-02-09T22:15:13.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 2.69%

Last modified Jun 17, 2026

CVE-2020-35125 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. A cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript via mautic[return] (a different attack method than CVE-2020-35124, but also related to the Referer concept).. EPSS estimates a 2.69% chance of exploitation in the next 30 days.

Description

A cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript via mautic[return] (a different attack method than CVE-2020-35124, but also related to the Referer concept).

Metrics

CVSS 3.1

9.6/10

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

EPSS Probability

2.69%

84.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Acquia	Mautic	< 2.16.5
Acquia	Mautic	>= 3.0.0, < 3.2.4

References

https://forum.mautic.org/c/announcements/16Vendor Advisory
https://github.com/mautic/mautic/security/advisories/GHSA-42q7-95j7-w62mPatch, Third Party Advisory
https://www.horizon3.ai/disclosures/mautic-unauth-xss-to-rceExploit, Technical Description, Third Party Advisory
https://www.mautic.org/blog/community/security-release-all-versions-mautic-prior-2-16-5-and-3-2-4Release Notes, Vendor Advisory
https://forum.mautic.org/c/announcements/16Vendor Advisory
https://github.com/mautic/mautic/security/advisories/GHSA-42q7-95j7-w62mPatch, Third Party Advisory
https://www.horizon3.ai/disclosures/mautic-unauth-xss-to-rceExploit, Technical Description, Third Party Advisory
https://www.mautic.org/blog/community/security-release-all-versions-mautic-prior-2-16-5-and-3-2-4Release Notes, Vendor Advisory

Timeline

Published: Feb 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35125?

How severe is CVE-2020-35125?

CVE-2020-35125 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 2.69% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35125?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35125?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST