🛡️ CVE-2021-27909 — core

⚪ Unknown ✅ No Known Exploit CWE-79 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

XSS vulnerability on password reset page

Impact

For Mautic versions prior to 3.3.4, there is an XSS vulnerability on Mautic's password reset page where a vulnerable parameter, "bundle," in the URL could allow an attacker to execute Javascript code. The attacker would be required to convince or trick the target into clicking a password reset URL with the vulnerable parameter utilized.

Patches

Upgrade to 3.3.4 or 4.0.0

Workarounds

No

References

https://github.com/mautic/mautic/releases/tag/3.3.4

https://github.com/mautic/mautic/releases/tag/4.0.0

For more information

If you have any questions or comments about this advisory:

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2021-27909 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2021-27909 is recorded against 1 package.

  • mautic/core (from 4.0.0-alpha1 up to 4.0.0)

Timeline and source

Published on 1 September 2021 and last revised on 8 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CWE CWE-79
Public Exploit ✅ No
Source OSV
Published 2021-09-01
Updated 2026-08-12
Modified 2026-07-08
Fix URL N/A

Affected Packages

Software From version Fixed in
mautic/core 4.0.0-alpha1 4.0.0

Similar Threats

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