CVE-2021-27909

mediumpriority · track · 25EPSS 0.041 · 91 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

4.07% (91st) EPSS

CVSS 4.3 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

For Mautic versions prior to 3.3.4/4.0.0, 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.

cvss

Technical severity, 0–10. One row per scoring source.

6.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondary · security@mautic.orgexploitability 2.8 · impact 3.4

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Fsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

affected products (6)

Products and version ranges known to be affected.

Mautic Mauticunspecified → 3.3.4enisa_euvdEU
Mautic Mauticunspecified → 4.0.0enisa_euvdEU
acquia mautic< 3.3.4nvdUScpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*
acquia mautic= 4.0.0nvdUScpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*
Packagist mautic/core< 3.3.4osvUSpkg:composer/mautic/core
Packagist mautic/core4.0.0-alpha1 → 4.0.0osvUSpkg:composer/mautic/core

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-32hw-3pvh-vcvcXSS vulnerability on password reset page2021-09-01ghsa · osvUS
### 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: * Email us at [security@mautic.org](mailto:security@mautic.org)

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-08-30modified 2026-06-17

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+53008 more

references (4)

External citations — patches, advisories, analysis.

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