CVE-2021-22192Public exploitNetwork attack vector

Authenticated code execution via Kramdown inline options

Published Mar 24, 2021 · Updated Aug 3, 2024

Code injection in GitLab CE/EE allows remote authenticated users with wiki push access to execute arbitrary Ruby code on the server. Wiki rendering passes attacker-controlled Kramdown inline Rouge formatter options to constant lookup, and a Redis driver path traverses to and loads an uploaded Ruby file. Exploitation requires permission to push a crafted non-Markdown wiki page and upload the payload, after which code runs in the GitLab server context.

CVSS severity9.9
Critical
EPSS probability13.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in GitLab CE/EE allows remote authenticated users with wiki push access to execute arbitrary Ruby code on the server. Wiki rendering passes attacker-controlled Kramdown inline Rouge formatter options to constant lookup, and a Redis driver path traverses to and loads an uploaded Ruby file. Exploitation requires permission to push a crafted non-Markdown wiki page and upload the payload, after which code runs in the GitLab server context.

The record

CVE
CVE-2021-22192
Published
Mar 24, 2021
Updated
Aug 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
T1190
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>=13.2, <13.7.9
  2. Affected versionversion=>=13.8, <13.8.6
  3. Affected versionversion=>=13.9, <13.9.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=>=13.2, <13.7.9; version=>=13.8, <13.8.6; version=>=13.9, <13.9.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
9.9GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo