Is CVE-2021-39885 in the CISA KEV catalog?

No. CVE-2021-39885 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-39885?

CVE-2021-39885 has a CVSS v3 base score of 8.7 (HIGH).

What is the EPSS score for CVE-2021-39885?

CVE-2021-39885 has an EPSS score of 0.95% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-39885?

Upgrade gitlab to 14.2.5 or later.

CVE & CISA-KEV Catalog

CVE-2021-39885

HIGH

8.7

CVSS v3

NVD

Description

A Stored XSS in merge request creation page in all versions of Gitlab EE starting from 13.7 before 14.1.7, all versions starting from 14.2 before 14.2.5, and all versions starting from 14.3 before 14.3.1 allows an attacker to execute arbitrary JavaScript code on the victim's behalf via malicious approval rule names

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

gitlabNVD

Affected:>= 14.2.0, < 14.2.5Fixed in:14.2.5CVE-2021-39885derived 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

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.95%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Exploit2

Vendor Advisory1

gitlab.com

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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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 2024-11-21.