CVE-2021-24545 PoC — WordPress 插件 跨站脚本漏洞

Description

The plugin does not sanitise the HTML allowed in the Bio of users, allowing them to use malicious JavaScript code, which will be executed when anyone visit a post in the frontend made by such user. As a result, user with a role as low as author could perform Cross-Site Scripting attacks against users, which could potentially lead to privilege escalation when an admin view the related post/s.

介绍

# CVE-2021-24545

WP HTML Author Bio <= 1.2.0 - Author+ Stored Cross-Site Scripting

The plugin does not sanitise the HTML allowed in the Bio of users, allowing them to use malicious JavaScript code, which will be executed when anyone visit a post in the frontend made by such user. As a result, user with a role as low as author could perform Cross-Site Scripting attacks against users, which could potentially lead to privilege escalation when an admin view the related post/s.

# Proof of Concept

Login as an author, add the following payload in the Biographical Info field of the profile:
```<script>alert(/XSS/)</script>``` 

Then view post made by the author to trigger the XSS 

# Video POC:
https://www.youtube.com/watch?v=fhzJZ5hSI-g

文件快照

备注