How severe is CVE-2021-27915?

CVE-2021-27915 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2021-27915 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27915?

CVE-2021-27915 primarily affects Acquia Mautic. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-27915?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2021-27915 have an EU (EUVD) identifier?

Yes. CVE-2021-27915 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1069.

When was CVE-2021-27915 published?

CVE-2021-27915 was published on 2024-09-17 and last updated on 2026-06-17.

CVE-2021-27915

CVE-2021-27915 is a high-severity vulnerability in Acquia Mautic with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1069
Weakness: CWE-79
Affected product: Acquia Mautic
Published: 2024-09-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-27915?: 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.
How severe is CVE-2021-27915?: CVE-2021-27915 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2021-27915 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27915?: CVE-2021-27915 primarily affects Acquia Mautic. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-27915?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2021-27915 have an EU (EUVD) identifier?: Yes. CVE-2021-27915 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1069.
When was CVE-2021-27915 published?: CVE-2021-27915 was published on 2024-09-17 and last updated on 2026-06-17.

References

https://github.com/mautic/mautic/security/advisories/GHSA-2rc5-2755-v422

Affected products (9)

cpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:-:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:rc4:*:*:*:*:*:*

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