CVE-2025-58996Network attack vector

Author-level web-shell upload via automatic post thumbnails

Published Nov 6, 2025 · Updated Nov 6, 2025

Arbitrary file upload in Helmut Wandl Advanced Settings 3.1.1 and earlier allows remote authenticated users to upload a web shell. The flaw is reached through the activated Automatically generate Post Thumbnail feature, but published records do not identify the affected function or missing file-validation operation. Author-level access and activation of that feature are required; an uploaded executable file can run as a web shell on the WordPress server.

CVSS severity9.1
Critical
EPSS probability0.42%
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 Helmut Wandl Advanced Settings 3.1.1 and earlier allows remote authenticated users to upload a web shell. The flaw is reached through the activated Automatically generate Post Thumbnail feature, but published records do not identify the affected function or missing file-validation operation. Author-level access and activation of that feature are required; an uploaded executable file can run as a web shell on the WordPress server.

The record

CVE
CVE-2025-58996
Published
Nov 6, 2025
Updated
Nov 6, 2025
Vendor
Helmut Wandl
Product
Advanced Settings
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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=n/a <=<= 3.1.1 changes=[{"at":"3.2.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Helmut Wandl · Advanced Settingsversion=n/a <=<= 3.1.1 changes=[{"at":"3.2.0","status":"unaffected"}]

Published CVSS scores

9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

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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