CVE-2024-36402Network attack vector

Unauthenticated content planting via remote media caching

Published Jan 16, 2025 · Updated Feb 12, 2025

Improper authentication in Matrix Media Repo before 1.3.5 allows remote attackers to cache attacker-chosen media without credentials. The legacy unauthenticated media download endpoints accept a remote server and media identifier, fetch that object from the remote homeserver, and store it in the local repository. Any network client that can reach those endpoints can seed content that the local homeserver then serves without authentication, allowing unwanted or abusive media to persist in its cache.

CVSS severity5.3
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Matrix Media Repo before 1.3.5 allows remote attackers to cache attacker-chosen media without credentials. The legacy unauthenticated media download endpoints accept a remote server and media identifier, fetch that object from the remote homeserver, and store it in the local repository. Any network client that can reach those endpoints can seed content that the local homeserver then serves without authentication, allowing unwanted or abusive media to persist in its cache.

The record

CVE
CVE-2024-36402
Published
Jan 16, 2025
Updated
Feb 12, 2025
Vendor
t2bot.io
Product
Matrix Media Repo
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2025CVE 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

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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=< 1.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

t2bot.io · Matrix Media Repoversion=< 1.3.5

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

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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