CVE-2025-22923Public exploitNetwork attack vector

Authenticated file deletion via traversal path

Published Apr 2, 2025 · Updated Apr 3, 2025

Path traversal in OS4ED openSIS 8.0 through 9.1 allows remote authenticated users to delete arbitrary server files via a crafted POST request. The Staff.php removal handler accepts a base64-encoded traversal path in removefile and deletes the resolved file outside the intended staff-file location. An administrator or teacher account is required; deleting Data.php prevents database access and renders the application unusable.

CVSS severity8.8
High
EPSS probability0.85%
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 OS4ED openSIS 8.0 through 9.1 allows remote authenticated users to delete arbitrary server files via a crafted POST request. The Staff.php removal handler accepts a base64-encoded traversal path in removefile and deletes the resolved file outside the intended staff-file location. An administrator or teacher account is required; deleting Data.php prevents database access and renders the application unusable.

The record

CVE
CVE-2025-22923
Published
Apr 2, 2025
Updated
Apr 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

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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