CVE-2018-17451Network attack vector

Slack command execution via missing CSRF validation

Published Apr 15, 2023 · Updated Feb 6, 2025

CSRF in GitLab CE and EE 11.1.6 and earlier, 11.2.0 through 11.2.3, and 11.3.0 allows remote attackers to issue Slack slash commands. The Slack slash-command request handler accepts a cross-site request without enforcing an anti-CSRF check before dispatching the command. A victim must interact with attacker-controlled content while the Slack integration is configured; the command runs with the victim's GitLab authority.

CVSS severity8.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in GitLab CE and EE 11.1.6 and earlier, 11.2.0 through 11.2.3, and 11.3.0 allows remote attackers to issue Slack slash commands. The Slack slash-command request handler accepts a cross-site request without enforcing an anti-CSRF check before dispatching the command. A victim must interact with attacker-controlled content while the Slack integration is configured; the command runs with the victim's GitLab authority.

The record

CVE
CVE-2018-17451
Published
Apr 15, 2023
Updated
Feb 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1204
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204User Execution

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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