How severe is CVE-2025-4278?

CVE-2025-4278 has a CVSS 3.x base score of 8.7, 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 none.

Is CVE-2025-4278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-4278?

CVE-2025-4278 primarily affects Gitlab. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-4278?

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-2025-4278 have an EU (EUVD) identifier?

Yes. CVE-2025-4278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18169.

When was CVE-2025-4278 published?

CVE-2025-4278 was published on 2025-06-12 and last updated on 2026-06-17.

CVE-2025-4278

CVE-2025-4278 is a high-severity vulnerability in Gitlab with a CVSS 3.x base score of 8.7. Its EPSS exploit-prediction score of 11% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-80.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 11% (96th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18169
Weakness: CWE-80
Affected product: Gitlab
Published: 2025-06-12
Last modified: 2026-06-17

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting with 18.0 before 18.0.2. Under certain conditions html injection in new search page could lead to account takeover.

Frequently asked questions

What is CVE-2025-4278?: An issue has been discovered in GitLab CE/EE affecting all versions starting with 18.0 before 18.0.2. Under certain conditions html injection in new search page could lead to account takeover.
How severe is CVE-2025-4278?: CVE-2025-4278 has a CVSS 3.x base score of 8.7, 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 none.
Is CVE-2025-4278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4278?: CVE-2025-4278 primarily affects Gitlab. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-4278?: 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-2025-4278 have an EU (EUVD) identifier?: Yes. CVE-2025-4278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18169.
When was CVE-2025-4278 published?: CVE-2025-4278 was published on 2025-06-12 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*

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