CVE-2023-1965Public exploitNetwork attack vector

Access-token theft via unchecked SAML redirect

Published May 3, 2023 · Updated Jan 29, 2025

CSRF in GitLab EE allows remote attackers to steal third-party access tokens through Group SAML SSO using a crafted URL. The Group SAML callback accepts an attacker-controlled RelayState as a redirect target without verifying its destination and persists it in cookies. Exploitation requires Group SAML SSO, which is disabled by default, and user interaction with the crafted flow; exposed tokens grant the access authorized by the third-party provider.

CVSS severity6.8
Medium
EPSS probability0.43%
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 EE allows remote attackers to steal third-party access tokens through Group SAML SSO using a crafted URL. The Group SAML callback accepts an attacker-controlled RelayState as a redirect target without verifying its destination and persists it in cookies. Exploitation requires Group SAML SSO, which is disabled by default, and user interaction with the crafted flow; exposed tokens grant the access authorized by the third-party provider.

The record

CVE
CVE-2023-1965
Published
May 3, 2023
Updated
Jan 29, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-352, CAPEC-62, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 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=>=14.2, <15.9.6
  2. Affected versionversion=>=15.10, <15.10.5
  3. Affected versionversion=>=15.11, <15.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=>=14.2, <15.9.6; version=>=15.10, <15.10.5; version=>=15.11, <15.11.1

Published CVSS scores

6.8GitLabCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1528Steal Application Access Token

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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