CVE-2025-67720Public exploitNetwork attack vector

Arbitrary file write via unsanitized media filenames

Published Dec 11, 2025 · Updated Dec 11, 2025

Path traversal in Mayuri-Chan Pyrofork 2.3.68 and earlier allows remote attackers to write files via crafted Telegram media names. download_media uses the sender-controlled DocumentAttributeFilename value in os.path.join without reducing it to a basename, so relative or absolute paths escape the download directory. Exploitation requires the application to download the media without a custom filename and grants writes only where the Pyrofork process has filesystem permission.

CVSS severity6.5
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Mayuri-Chan Pyrofork 2.3.68 and earlier allows remote attackers to write files via crafted Telegram media names. download_media uses the sender-controlled DocumentAttributeFilename value in os.path.join without reducing it to a basename, so relative or absolute paths escape the download directory. Exploitation requires the application to download the media without a custom filename and grants writes only where the Pyrofork process has filesystem permission.

The record

CVE
CVE-2025-67720
Published
Dec 11, 2025
Updated
Dec 11, 2025
Vendor
Mayuri-Chan
Product
Pyrofork
Classifications
CWE-22, CAPEC-126, T1105
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 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=< 2.3.69

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mayuri-Chan · Pyroforkversion=< 2.3.69

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-126Path Traversal
T1105Ingress Tool Transfer

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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