CVE-2021-22261Public exploitNetwork attack vector

Stored XSS via unsanitized Jira issue key

Published Oct 5, 2021 · Updated Aug 3, 2024

Stored XSS in GitLab 13.9 through 14.0.8, 14.1 through 14.1.3, and 14.2 through 14.2.1 allows remote authenticated users to run JavaScript. GitLab renders the Jira API response key field on Jira issue detail pages without sanitizing attacker-controlled markup. Exploitation requires control of a configured Jira API response and a victim to open the affected issue page, enabling actions in the victim's GitLab browser context.

CVSS severity7.3
High
EPSS probability0.98%
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 13.9 through 14.0.8, 14.1 through 14.1.3, and 14.2 through 14.2.1 allows remote authenticated users to run JavaScript. GitLab renders the Jira API response key field on Jira issue detail pages without sanitizing attacker-controlled markup. Exploitation requires control of a configured Jira API response and a victim to open the affected issue page, enabling actions in the victim's GitLab browser context.

The record

CVE
CVE-2021-22261
Published
Oct 5, 2021
Updated
Aug 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 5, 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=>=13.9, <14.0.9
  2. Affected versionversion=>=14.1, <14.1.4
  3. Affected versionversion=>=14.2, <14.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

GitLab · GitLabversion=>=13.9, <14.0.9; version=>=14.1, <14.1.4; version=>=14.2, <14.2.2

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
7.3GitLab Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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