How severe is CVE-2021-27917?

CVE-2021-27917 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-27917 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27917?

CVE-2021-27917 primarily affects Acquia Mautic. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-27917?

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-2021-27917 have an EU (EUVD) identifier?

Yes. CVE-2021-27917 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2895.

When was CVE-2021-27917 published?

CVE-2021-27917 was published on 2024-09-18 and last updated on 2026-06-17.

CVE-2021-27917

CVE-2021-27917 is a high-severity vulnerability in Acquia Mautic with a CVSS 3.x base score of 7.3. 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 7.3)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2895
Weakness: CWE-79
Affected product: Acquia Mautic
Published: 2024-09-18
Last modified: 2026-06-17

Description

Prior to this patch, a stored XSS vulnerability existed in the contact tracking and page hits report.

Frequently asked questions

What is CVE-2021-27917?: Prior to this patch, a stored XSS vulnerability existed in the contact tracking and page hits report.
How severe is CVE-2021-27917?: CVE-2021-27917 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-27917 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27917?: CVE-2021-27917 primarily affects Acquia Mautic. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-27917?: 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-2021-27917 have an EU (EUVD) identifier?: Yes. CVE-2021-27917 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2895.
When was CVE-2021-27917 published?: CVE-2021-27917 was published on 2024-09-18 and last updated on 2026-06-17.

References

https://github.com/mautic/mautic/security/advisories/GHSA-xpc5-rr39-v8v2

Affected products (7)

cpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*
cpe:2.3:a:acquia:mautic:1.0.0:-:*:*:*:*:*:*
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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