CVE-2021-27909 json
XSS vulnerability on password reset page
published 2021-08-30 5 y ago modified 2026-07-08 4 mo ago also GHSA-32hw-3pvh-vcvc , EUVD-2021-1956
- cvss
- 6.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.1%
- EPSS 4.1% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- packagist mautic/core 3.3.4, 4.0.0
- Mautic Mautic 3.3.4, 4.0.0
Exploit prediction
4.07% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Mautic <3.3.4 - Cross-Site Scripting nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | mautic/core | <3.3.4 >=4.0.0-alpha1, <4.0.0 |
3.3.4 4.0.0 |
Affected products
- Mautic Mautic
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/mautic/mautic/security/advisories/GHSA-32hw-3pvh-vcvc
web, patch, third-party-advisory
-
github.com
/mautic/mautic/commit/942cb6992df619fdf1c181bfad9e25d5d4178b6f
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-27909
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/mautic/core/CVE-2021-27909.yaml
web
-
github.com
/mautic/mautic
package
Sources
- CVE List CVE-2021-27909
- GitHub Advisory GHSA-32hw-3pvh-vcvc
- NVD CVE-2021-27909
Fencer Vulns 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.