CVE-2022-3870Public exploitNetwork attack vector

Avatar disclosure via unauthenticated user ID enumeration

Published Jan 12, 2023 · Updated Apr 9, 2025

Information disclosure in GitLab allows remote attackers to download user avatars by requesting predictable user-ID-based upload paths. The uploads route serves /uploads/-/system/user/avatar/{user_id}/avatar.png directly without enforcing the instance's public-visibility restriction, so sequential identifiers expose stored avatar images. The flaw is reachable without cookies or tokens on private instances that restrict public visibility, and it discloses profile images while revealing which guessed accounts have avatars.

CVSS severity5.3
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in GitLab allows remote attackers to download user avatars by requesting predictable user-ID-based upload paths. The uploads route serves /uploads/-/system/user/avatar/{user_id}/avatar.png directly without enforcing the instance's public-visibility restriction, so sequential identifiers expose stored avatar images. The flaw is reachable without cookies or tokens on private instances that restrict public visibility, and it discloses profile images while revealing which guessed accounts have avatars.

The record

CVE
CVE-2022-3870
Published
Jan 12, 2023
Updated
Apr 9, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-200, T1589
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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=>=10.0, <15.5.7
  2. Affected versionversion=>=15.6, <15.6.4
  3. Affected versionversion=>=15.7, <15.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=>=10.0, <15.5.7; version=>=15.6, <15.6.4; version=>=15.7, <15.7.2

Published CVSS scores

5.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1589Gather Victim Identity Information

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo