CVE-2018-17454Network attack vector

Stored XSS via unsanitized issue-details JSON

Published Apr 15, 2023 · Updated Feb 6, 2025

Stored XSS in GitLab CE and EE before 11.1.7, 11.2.0 through 11.2.3, and 11.3.0 allows remote authenticated users to run script. The issue details view embeds inadequately sanitized JSON data, allowing stored attacker-controlled content to execute in a visitor's browser. A low-privileged account must store the payload and another user must open the affected issue details screen; execution is limited to that user's web session.

CVSS severity5.4
Medium
EPSS probability0.40%
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 CE and EE before 11.1.7, 11.2.0 through 11.2.3, and 11.3.0 allows remote authenticated users to run script. The issue details view embeds inadequately sanitized JSON data, allowing stored attacker-controlled content to execute in a visitor's browser. A low-privileged account must store the payload and another user must open the affected issue details screen; execution is limited to that user's web session.

The record

CVE
CVE-2018-17454
Published
Apr 15, 2023
Updated
Feb 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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