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CVE-2021-22205: GitLab Community and Enterprise Editions Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2021-22205
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
GitHub Community and Enterprise Editions that utilize the ability to upload images through GitLab Workhorse are vulnerable to remote code execution. Workhorse passes image file extensions through ExifTool, which improperly validates the image files.

CSIRTS triage

vendor: GitLabproduct: Community and Enterprise EditionsRemote code execution
What
GitLab Community and Enterprise Editions are vulnerable to remote code execution due to improper validation of image files.
Who is affected
Deployments of GitLab that utilize image uploads through GitLab Workhorse.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of GitLab.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-22205

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-22205coverage & exploitation statusNVD · CVE.org

Recent advisories for GitLab Community and

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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