CVE-2024-56515Network attack vector

Data disclosure via claimed-type decoder confusion

Published Jan 16, 2025 · Updated Feb 12, 2025

Decoder confusion in Matrix Media Repo before 1.3.8 allows remote authenticated users to disclose data through crafted thumbnail requests. The thumbnailing path trusts a file's claimed SVG, JPEGXL, or MP4 type, allowing ImageMagick or ffmpeg to dispatch its content to another decoder. Exposure requires a disabled-by-default thumbnailer and a decoder capable of processing the disguised format; affected ImageMagick setups can invoke Ghostscript.

CVSS severity6.8
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Decoder confusion in Matrix Media Repo before 1.3.8 allows remote authenticated users to disclose data through crafted thumbnail requests. The thumbnailing path trusts a file's claimed SVG, JPEGXL, or MP4 type, allowing ImageMagick or ffmpeg to dispatch its content to another decoder. Exposure requires a disabled-by-default thumbnailer and a decoder capable of processing the disguised format; affected ImageMagick setups can invoke Ghostscript.

The record

CVE
CVE-2024-56515
Published
Jan 16, 2025
Updated
Feb 12, 2025
Vendor
t2bot.io
Product
Matrix Media Repo
Classifications
CWE-502
Attack vector
network
Privileges
authenticated

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=< 1.3.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

t2bot.io · Matrix Media Repoversion=< 1.3.8

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
6.5NIST NVDCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

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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