CVE-2021-24879 SupportCandy < 2.2.7 - CSRF to Cross-Site Scripting

What is CVE-2021-24879?

CVE-2021-24879 is a high-severity cross-site scripting vulnerability in Unknown SupportCandy – Helpdesk & Support Ticket System, published on 7 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The SupportCandy WordPress plugin before 2.2.7 does not have CSRF check in the wpsc_tickets AJAX action, nor has any sanitisation or escaping in some of the filter fields which could allow attackers to make a logged in user having access to the ticket lists dashboard set an arbitrary filter (stored in their cookies) with an XSS payload in it.

Weakness: CWE-352

Which versions are affected by CVE-2021-24879?

It affects 1 product.

Products include Supportcandy Supportcandy.

How do I fix CVE-2021-24879?

No fix has been published for CVE-2021-24879 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-24879 being exploited?

There is no known exploitation of CVE-2021-24879 in the wild and no public exploit code.

Other vulnerabilities in Unknown SupportCandy – Helpdesk & Support Ticket System

• CVE-2023-1730 SupportCandy < 3.1.5 - Unauthenticated SQLi Critical 9.8
• CVE-2019-11223 File upload in n/a Critical 9.8
• CVE-2023-2719 SupportCandy < 3.1.7 - Subscriber+ SQLi High 8.8
• CVE-2021-24839 SupportCandy < 2.2.5 - Unauthenticated Arbitrary Ticket Deletion High 7.5
• CVE-2023-2805 SupportCandy < 3.1.7 - Admin+ SQLi High 7.2

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3wmq-h2jq-wfgw.