What is the CVSS score of CVE-2025-13543?

CVE-2025-13543 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of PHP are affected by CVE-2025-13543?

The PostGallery WordPress plugin contains a critical file upload vulnerability affecting all versions through 1.12.5 that could allow authenticated users to upload malicious files and potentially…

How to fix or mitigate CVE-2025-13543?

Within 24 hours: Identify all WordPress installations using PostGallery plugin and document affected versions. Within 7 days: Disable the PostGallery plugin entirely or restrict upload functionality through user role management (remove upload permissions from subscriber and contributor accounts). Within 30 days: Remove the plugin completely and migrate to an alternative gallery solution, or await vendor patch release and perform immediate update and security audit.

PHP CVE-2025-13543

EUVD-2025-201275 HIGH

Unrestricted Upload of File with Dangerous Type (CWE-434)

2025-12-04 security@wordfence.com

PHP WordPress RCE File Upload

8.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 16:35 euvd

EUVD-2025-201275

Analysis Generated

Mar 15, 2026 - 16:35 vuln.today

CVE Published

Dec 04, 2025 - 21:16 nvd

HIGH 8.8

DescriptionNVD

The PostGallery plugin for WordPress is vulnerable to arbitrary file uploads due to incorrect file type validation in the 'PostGalleryUploader' class functions in all versions up to, and including, 1.12.5. This makes it possible for authenticated attackers, with subscriber-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Analysis

Technical ContextAI

Unrestricted file upload allows attackers to upload malicious files (web shells, executables) that can then be executed on the server. This vulnerability is classified as Unrestricted Upload of File with Dangerous Type (CWE-434).

RemediationAI

Validate file types by content (magic bytes), not just extension. Store uploads outside the web root. Use random filenames. Scan uploads for malware.

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CVE-2025-13543 vulnerability details – vuln.today

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PHP CVE-2025-13543

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

Analysis

Technical ContextAI

RemediationAI

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External POC / Exploit Code