CVE-2021-22185Network attack vector

Stored XSS via unescaped wiki commit author

Published Mar 24, 2021 · Updated Aug 3, 2024

Stored XSS in GitLab 13.8 through 13.8.4 and 13.9 through 13.9.1 allows remote authenticated users to run script via a wiki commit. The wiki page renderer interpolates the commit author name into a strong element and marks the assembled string HTML-safe without escaping the author-controlled value. A project member must create the crafted wiki commit, and another user must view the affected wiki content; script runs in that viewer's GitLab session.

CVSS severity5.4
Medium
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in GitLab 13.8 through 13.8.4 and 13.9 through 13.9.1 allows remote authenticated users to run script via a wiki commit. The wiki page renderer interpolates the commit author name into a strong element and marks the assembled string HTML-safe without escaping the author-controlled value. A project member must create the crafted wiki commit, and another user must view the affected wiki content; script runs in that viewer's GitLab session.

The record

CVE
CVE-2021-22185
Published
Mar 24, 2021
Updated
Aug 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>=13.8, <13.8.5
  2. Affected versionversion=>=13.9, <13.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=>=13.8, <13.8.5; version=>=13.9, <13.9.2

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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