zhenfeng13 My-Blog タグ保存におけるクロスサイトスクリプティング

The XSS vulnerability in My-Blog allows an attacker to inject arbitrary JavaScript code into the application. This code will then be executed in the context of a user's browser when they visit a compromised page. An attacker could leverage this to steal session cookies, redirect users to malicious websites, or deface the blog's content. The impact is particularly severe if the blog is used for sensitive information or has a large user base, as a successful attack could affect many users simultaneously. This type of XSS is often used as a stepping stone for further attacks, such as phishing or malware distribution.

Blog administrators and users of My-Blog are at risk. Specifically, those using older, unpatched versions (1.0.0 and earlier) are vulnerable. Shared hosting environments running My-Blog are also at increased risk due to the potential for cross-tenant exploitation.

• generic web: Use curl to test the /admin/tags/save endpoint with a simple XSS payload (e.g., <script>alert(1)</script>).

curl -X POST -d '<script>alert(1)</script>' http://your-blog-url/admin/tags/save

• generic web: Examine access and error logs for suspicious requests to /admin/tags/save containing XSS payloads. • generic web: Check response headers for the presence of XSS payloads after submitting data to /admin/tags/save.

1. 2025-08-18Disclosure

   disclosure

1. 予約済み2025-08-17
2. 公開日2025-08-18
3. EPSS 更新日2026-03-23

The primary mitigation for CVE-2025-9101 is to upgrade My-Blog to version 1.0.1 or later, which contains the fix. If upgrading is not immediately feasible, consider implementing input validation and output encoding on the /admin/tags/save endpoint to sanitize user-supplied data. Web application firewalls (WAFs) configured to detect and block XSS payloads can also provide a temporary layer of protection. Review and restrict access to the /admin/tags/save endpoint to authorized personnel only.