CVE-2025-5509Public exploitNetwork attack vector

Authenticated arbitrary file write via upload traversal

Published Jun 3, 2025 · Updated Jun 3, 2025

Path traversal in quequnlong shiyi-blog 1.2.0 and 1.2.1 allows remote authenticated users to write files outside the upload directory. The upload handler directly concatenates the multipart filename and source parameter into the destination path without constraining traversal segments. A valid backend authorization token is required; successful exploitation can overwrite server files and enable subsequent code execution or a service crash.

CVSS severity5.3
Medium
EPSS probability0.70%
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 quequnlong shiyi-blog 1.2.0 and 1.2.1 allows remote authenticated users to write files outside the upload directory. The upload handler directly concatenates the multipart filename and source parameter into the destination path without constraining traversal segments. A valid backend authorization token is required; successful exploitation can overwrite server files and enable subsequent code execution or a service crash.

The record

CVE
CVE-2025-5509
Published
Jun 3, 2025
Updated
Jun 3, 2025
Vendor
quequnlong
Product
shiyi-blog
Classifications
CWE-22, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=1.2.0
  2. Affected versionversion=1.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

quequnlong · shiyi-blogversion=1.2.0; version=1.2.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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.

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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path 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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