Is CVE-2025-12983 in the CISA KEV catalog?

No. CVE-2025-12983 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-12983?

CVE-2025-12983 has a CVSS v3 base score of 3.5 (LOW).

What is the EPSS score for CVE-2025-12983?

CVE-2025-12983 has an EPSS score of 0.37% (28th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-12983?

Upgrade gitlab to 18.5.2 or later.

CVE & CISA-KEV Catalog

CVE-2025-12983

LOW

3.5

CVSS v3

NVD

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.

CWE-789

How to fix

Remediation Available

gitlabNVD

Affected:>= 18.5.0, < 18.5.2Fixed in:18.5.2CVE-2025-12983derived 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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.37%probability of exploitation in 30 days

28thpercentile

Low risk: more likely to be exploited than 28% of all known CVEs.

References

Vendor Advisory1

about.gitlab.com

Other references2

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Markdown

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HTML

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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 2025-11-19.