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CVE-2021-27915

26
FAUCET Score

CVE-2021-27915 is a critical cross-site scripting (XSS) vulnerability affecting Acquia Mautic, specifically within description fields. A logged-in user with appropriate permissions could exploit this to gain elevated system access. With a CVSS score of 9.0, this vulnerability is easily exploitable over the network with low privileges and user interaction, leading to high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, < 4.4.12CPE matchmatch criteria
cpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:acquia:mautic:1.0.0:-:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:acquia:mautic:1.0.0:beta2:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:acquia:mautic:1.0.0:beta3:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:acquia:mautic:1.0.0:beta4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.6HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
2.1
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.58%
Probability of exploitation in next 30 days
EPSS Percentile
44.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 45th percentile among its peer group of 265 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.6 Bluesky, 0.3 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: mautic/coreFixed in: 4.4.12
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-2rc5-2755-v422high

Mautic vulnerable to stored cross-site scripting in description field

Apr 11, 2024

References

github.com / mautic/mautic/security/advisories/GHSA-2rc5-2755-v422
Vendor Advisory