CVE-2025-12846Network attack vector

Authenticated file upload via SVG double extensions

Published Nov 11, 2025 · Updated Nov 11, 2025

Arbitrary file upload in Creative Themes Blocksy Companion 2.1.19 and earlier allows remote authenticated users to place files on the server. The SVG upload handler accepts double-extension filenames as valid SVG files, so dangerous content bypasses its file-type sanitization. Author-level WordPress access or higher is required; server-executable uploaded content yields code execution when the hosting stack executes it.

CVSS severity8.8
High
EPSS probability0.69%
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 Creative Themes Blocksy Companion 2.1.19 and earlier allows remote authenticated users to place files on the server. The SVG upload handler accepts double-extension filenames as valid SVG files, so dangerous content bypasses its file-type sanitization. Author-level WordPress access or higher is required; server-executable uploaded content yields code execution when the hosting stack executes it.

The record

CVE
CVE-2025-12846
Published
Nov 11, 2025
Updated
Nov 11, 2025
Vendor
Creative Themes
Product
Blocksy Companion
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 11, 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=* <=2.1.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Creative Themes · Blocksy Companionversion=* <=2.1.19

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
T1105Ingress Tool Transfer

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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