CVE-2020-35128

Name: CVE-2020-35128
Creator: NVD / NIST
Published: 2021-01-19T14:15:12.153+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9/10EPSS 1.65%

Last modified Jun 17, 2026

CVE-2020-35128 is a critical-severity vulnerability rated 9/10 on the CVSS scale. Mautic before 3.2.4 is affected by stored XSS. An attacker with permission to manage companies, an application feature, could attack other users, including administrators. EPSS estimates a 1.65% chance of exploitation in the next 30 days.

Description

Mautic before 3.2.4 is affected by stored XSS. An attacker with permission to manage companies, an application feature, could attack other users, including administrators. For example, by loading an externally crafted JavaScript file, an attacker could eventually perform actions as the target user. These actions include changing the user passwords, altering user or email addresses, or adding a new administrator to the system.

Metrics

CVSS 3.1

9/10

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

EPSS Probability

1.65%

73.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Acquia	Mautic	>= 2.0.0, < 2.16.5
Acquia	Mautic	>= 3.2.0, < 3.2.4

References

https://forum.mautic.org/c/announcements/16Vendor Advisory
https://forum.mautic.org/t/security-release-for-all-versions-of-mautic-prior-to-2-16-5-and-3-2-4/17786Exploit, Vendor Advisory
https://labs.bishopfox.com/advisories/mautic-version-3.2.2Third Party Advisory
https://forum.mautic.org/c/announcements/16Vendor Advisory
https://forum.mautic.org/t/security-release-for-all-versions-of-mautic-prior-to-2-16-5-and-3-2-4/17786Exploit, Vendor Advisory
https://labs.bishopfox.com/advisories/mautic-version-3.2.2Third Party Advisory

Timeline

Published: Jan 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35128?

How severe is CVE-2020-35128?

CVE-2020-35128 has a CVSS score of 9/10 (CRITICAL severity). The EPSS model estimates a 1.65% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35128?

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-2020-35128?

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

Scan your code now

Source: NVD / NIST