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Fencer Intel
critical 9.0

CVE-2020-35128 json

Mautic stored Cross-site Scripting (XSS)

published 5y ago modified 4mo ago also GHSA-98j2-3jv7-274m , EUVD-2022-3326

cvss
9.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist mautic/core 2.16.5, 3.2.4
  • acquia mautic 2.16.5, 3.2.4

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Exploit prediction

1.67% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • forum.mautic.org https://forum.mautic.org/t/security-release-for-all-versions-of-mautic-prior-to-2-16-5-and-3-2-4/17786 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P
GitHub 3.1 9.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist mautic/core
>=3.2.0, <3.2.4
>=2.0.0, <2.16.5
3.2.4
2.16.5

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.