CVE-2025-13536Network attack vector

Authenticated arbitrary upload via nonterminating extension validation

Published Nov 27, 2025 · Updated Apr 8, 2026

Arbitrary file upload in Blubrry PowerPress 11.15.2 and earlier allows remote authenticated users to place crafted files on the server. The powerpress_edit_post function checks the submitted file extension but continues the upload path after validation fails. Contributor-level access is required, and code execution additionally depends on the server executing the uploaded file type.

CVSS severity8.8
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Blubrry PowerPress 11.15.2 and earlier allows remote authenticated users to place crafted files on the server. The powerpress_edit_post function checks the submitted file extension but continues the upload path after validation fails. Contributor-level access is required, and code execution additionally depends on the server executing the uploaded file type.

The record

CVE
CVE-2025-13536
Published
Nov 27, 2025
Updated
Apr 8, 2026
Vendor
Blubrry
Product
PowerPress
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=11.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Blubrry · PowerPressversion=0 <=11.15.2

Published CVSS scores

8.8WordfenceCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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