Cross-site scripting in Z-BlogPHP - CVE-2018-7736

Detailed vulnerability description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing the ZC_BLOG_SUBNAME parameter or ZC_UPLOAD_FILETYPE parameter. NOTE: the software maintainer disputes that this is a vulnerability. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

How to mitigate CVE-2018-7736

Sources

• https://github.com/ponyma233/cms/blob/master/Z-Blog_1.5.1.1740_bugs.md
• https://github.com/zblogcn/zblogphp/issues/205
• https://packetstormsecurity.com/files/147066/Z-Blog-1.5.1.1740-Cross-Site-Scripting.html
• https://www.exploit-db.com/exploits/44406/