CVE-2025-15503Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted JSP upload

Published Jan 10, 2026 · Updated Jan 10, 2026

Unrestricted file upload in Sangfor OSM 3.0.0 through 3.0.8 allows remote attackers to write executable JSP files via common.jsp. The unauthenticated /fort/trust/version/common/common.jsp handler accepts multipart data, omits file-type validation, and saves the supplied file beneath an executable web directory. No account or user interaction is required; uploading a JSP web shell enables code execution with the web server's privileges.

CVSS severity9.8
Critical
EPSS probability2.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Sangfor OSM 3.0.0 through 3.0.8 allows remote attackers to write executable JSP files via common.jsp. The unauthenticated /fort/trust/version/common/common.jsp handler accepts multipart data, omits file-type validation, and saves the supplied file beneath an executable web directory. No account or user interaction is required; uploading a JSP web shell enables code execution with the web server's privileges.

The record

CVE
CVE-2025-15503
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
Sangfor Technologies
Product
Operation and Maintenance Security Management System (OSM)
Classifications
CWE-434, CWE-284, T1505.003, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0
  2. Affected versionversion=3.0.1
  3. Affected versionversion=3.0.2
  4. Affected versionversion=3.0.3
  5. Affected versionversion=3.0.4
  6. Affected versionversion=3.0.5
  7. Affected versionversion=3.0.6
  8. Affected versionversion=3.0.7
  9. Affected versionversion=3.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sangfor Technologies · Operation and Maintenance Security Management System (OSM)version=3.0.0; version=3.0.1; version=3.0.2; version=3.0.3; version=3.0.4; version=3.0.5; version=3.0.6; version=3.0.7; version=3.0.8

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1505.003Web Shell
T1190Exploit Public-Facing Application

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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