CVE-2025-53242 CRITICAL

CVE-2025-53242: WordPress Seil Theme <= 1.7.1 - Deserialization of untrusted data Vulnerability

Vendor Victorthemes
Product Seil
Weakness CWE-502 · Unsafe deserialization
Published November 6, 2025
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in VictorThemes Seil seil allows Object Injection.This issue affects Seil: from n/a through <= 1.7.1.

Explanation of Vulnerability in Simple Terms

02Summary

Seil versions up to 1.7.1 contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on the server. The vulnerability exists in how the product processes untrusted serialized data without proper validation. An attacker can exploit this remotely over the network without requiring authentication or user interaction.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server, read/modify site data, or take the site offline.

Potential impact on your site

04Site Impact

Complete compromise of the site and server; attacker gains full control without needing valid credentials.

Conditions required to exploit

05Prerequisites

Network access to the vulnerable Seil installation; no authentication required.

Key dates

06Disclosure timeline

November 6, 2025 CVE published
April 28, 2026 Record updated