CVE-2025-7739Public exploitNetwork attack vector

Stored XSS via unsanitized placeholder substitution

Published Aug 13, 2025 · Updated Aug 13, 2025

Stored cross-site scripting in scoped label descriptions in GitLab CE/EE 18.2 before 18.2.2 allows remote authenticated users to execute actions. GitLab Flavored Markdown permits later placeholder replacement to introduce attacker-controlled tag markup into a scoped-label tooltip title after normal sanitization. The published reproduction requires scoped labels, the markdown_placeholders feature, and a victim to expose and activate the tooltip; the resulting script can act on the victim's behalf.

CVSS severity8.7
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in scoped label descriptions in GitLab CE/EE 18.2 before 18.2.2 allows remote authenticated users to execute actions. GitLab Flavored Markdown permits later placeholder replacement to introduce attacker-controlled tag markup into a scoped-label tooltip title after normal sanitization. The published reproduction requires scoped labels, the markdown_placeholders feature, and a victim to expose and activate the tooltip; the resulting script can act on the victim's behalf.

The record

CVE
CVE-2025-7739
Published
Aug 13, 2025
Updated
Aug 13, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2025Record 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=18.2 <18.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=18.2 <18.2.2

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
8.7GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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 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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