What is CVE-2021-27914?

CVE-2021-27914 is a high-severity vulnerability in Acquia Mautic, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2022-06-01.

How severe is CVE-2021-27914?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Acquia Mautic

CVE-2021-27914

A cross-site scripting (XSS) vulnerability in the installer component of Mautic before 4.3.0 allows admins to inject executable javascript

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Acquia Mautic
Mautic — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/mautic/mautic/security/advisories/GHSA-jrwm-pr9x-cgq3 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-27914?: CVE-2021-27914 is a high-severity vulnerability in Acquia Mautic, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2022-06-01.
How severe is CVE-2021-27914?: High severity. CVSS v3 base score is 7.6 out of 10.