---
id: CVE-2025-9629
title: >-
  The USS Upyun plugin for WordPress is vulnerable to Cross-Site Request Forgery
  in all versions up to, and including, 1.5.0
summary: >-
  The USS Upyun plugin for WordPress is vulnerable to Cross-Site Request Forgery
  in all versions up to, and including, 1.5.0. This is due to missing or
  incorrect nonce validation on the uss_setting_page function when processing
  the uss_set…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-352
published: '2025-09-17'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-9629'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/uss-upyun/tags/1.5.0/upyun-uss-wordpress.php#L493
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/uss-upyun/tags/1.5.0/upyun-uss-wordpress.php#L499
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/uss-upyun/tags/1.5.1/upyun-uss-wordpress.php#L493
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/d2cee46a-03d5-4a31-ba15-28be97794199?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00167
epssPercentile: 0.05318
ingestedAt: '2026-09-26T00:22:39.921Z'
---

## Overview

The USS Upyun plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.5.0. This is due to missing or incorrect nonce validation on the uss_setting_page function when processing the uss_set form type. This makes it possible for unauthenticated attackers to modify critical Upyun cloud storage settings including bucket name, operator credentials, upload paths, and image processing parameters via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.