Is CVE-2023-3906 in the CISA KEV catalog?

No. CVE-2023-3906 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-3906?

CVE-2023-3906 has a CVSS v3 base score of 3.5 (LOW).

What is the EPSS score for CVE-2023-3906?

CVE-2023-3906 has an EPSS score of 0.48% (38th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-3906?

Upgrade gitlab to 16.3.5 or later.

CVE & CISA-KEV Catalog

CVE-2023-3906

LOW

3.5

CVSS v3

NVD

Description

An input validation issue in the asset proxy in GitLab EE, affecting all versions from 12.3 prior to 16.2.8, 16.3 prior to 16.3.5, and 16.4 prior to 16.4.1, allowed an authenticated attacker to craft image urls which bypass the asset proxy.

CWE-1287Improper Validation of Specified Type of Input

How to fix

Remediation Available

gitlabNVD

Affected:>= 16.3.0, < 16.3.5Fixed in:16.3.5CVE-2023-3906derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.48%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Vendor Advisory1

gitlab.com

Other references1

hackerone.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-05.