CVE-2023-0485Public exploitNetwork attack vector

Authenticated source disclosure via cross-project fork comparison

Published May 3, 2023 · Updated Feb 12, 2025

Improper authorization in affected GitLab versions allows remote authenticated users to read private project updates through a fork. The repository comparison API authorizes access to the fork but accepts a from_project_id for the private upstream project, exposing upstream changes in the generated diff. Exploitation requires Guest membership after a role downgrade and read-code access to a pre-existing fork; the disclosed data is limited to repository changes represented by the comparison.

CVSS severity6.5
Medium
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in affected GitLab versions allows remote authenticated users to read private project updates through a fork. The repository comparison API authorizes access to the fork but accepts a from_project_id for the private upstream project, exposing upstream changes in the generated diff. Exploitation requires Guest membership after a role downgrade and read-code access to a pre-existing fork; the disclosed data is limited to repository changes represented by the comparison.

The record

CVE
CVE-2023-0485
Published
May 3, 2023
Updated
Feb 12, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-668, T1213.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>=13,11, <15.8.5
  2. Affected versionversion=>=15.10, <15.10.1
  3. Affected versionversion=>=15.9, <15.9.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=>=13,11, <15.8.5; version=>=15.10, <15.10.1; version=>=15.9, <15.9.4

Published CVSS scores

6.5GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-668Exposure of Resource to Wrong Sphere
T1213.003Code Repositories

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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