Reflected Cross Site Scripting(XSS) - events.php

[Loginsoft-Research]

Describe Your Environment

• ZoneMinder v1.33.1
• Installed from - ppa:iconnor/zoneminder-master

Describe the bug
The view events, insecurely displays the limit parameter value, without applying any proper output filtration leading to XSS. This issue exists because of function sortHeader() in functions.php which insecurely returns the value of limit query string parameter without applying any filtration.

To Reproduce
Affected URL :
http://localhost/zm/index.php?view=events&filter[Query][terms][0][attr]=Archived&filter[Query][terms][0][op]==&filter[Query][terms][0][val]=0&filter[Query][terms][1][cnj]=-3439)OR1=1-&filter[Query][terms][1][attr]=DiskPercent&filter[Query][terms][1][op]=>=&filter[Query][terms][1][val]=95&sort_field=Id&sort_asc=2&limit="><img src=x onerror-prompt('1');>&page=2

Payload used - "><img src=x onerror-prompt('1');>

• Navigate to the Affected URL, Payload would be triggered.

Expected behavior

• Proper escaping of special characters.

Debug Logs

None