CVE-2020-12277Network attack vector

Unauthorized repository mirroring via missing feature-state enforcement

Published Apr 29, 2020 · Updated Aug 4, 2024

Authorization bypass in GitLab 10.8 through 12.9 allows remote authenticated users to configure repository mirroring when it is disabled. The repository-mirroring settings path accepts mirror configuration without enforcing the instance-wide feature-disable setting; GitLab has not disclosed a more specific code locus. A user able to administer a project can create an unauthorized mirror, changing where repository content is synchronized without otherwise modifying project data.

CVSS severity5.3
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in GitLab 10.8 through 12.9 allows remote authenticated users to configure repository mirroring when it is disabled. The repository-mirroring settings path accepts mirror configuration without enforcing the instance-wide feature-disable setting; GitLab has not disclosed a more specific code locus. A user able to administer a project can create an unauthorized mirror, changing where repository content is synchronized without otherwise modifying project data.

The record

CVE
CVE-2020-12277
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

Public exploit references

No public exploit references are available in this record.

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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