CVE-2021-24622

Customer Service Software & Support Ticket System < 5.10.4 - Authenticated (Admin+) Stored Cross-Site Scripting

2021-09-20 00:00
Tri Wanda Septian

Strategic Overview

Status
Patched in 5.10.4
Affected Plugin
Customer Support Ticket System & Helpdesk
Affected Version
< 5.10.4
CVSS
5.5Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24622
View all Customer Support Ticket System & Helpdesk vulnerabilities

At a glance

CVE-2021-24622 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Customer Support Ticket System & Helpdesk WordPress plugin, affecting versions < 5.10.4. It carries a CVSS score of 5.5 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Admin level or above. The issue is fixed in version 5.10.4; sites on affected versions should update now. Disclosed September 2021, reported by Tri Wanda Septian.

Vulnerability Overview

The Customer Service Software & Support Ticket System WordPress plugin before 5.10.4 does not sanitize or escape form fields before outputting it in the List, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Customer Support Ticket System & Helpdesk < 5.10.4 takes an account at Admin level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Customer Support Ticket System & Helpdesk the fix is 5.10.4: builds < 5.10.4 are affected, anything from 5.10.4 onward is not.

Remediation

Update to version 5.10.4, or a newer patched version

How does WordSec protect against this?

An attacker needs Admin access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Customer Support Ticket System & Helpdesk 5.10.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24622https://www.wordfence.com/threat-intel/vulnerabilities/id/e67422cc-c1ad-40b6-abae-23447e2ff491https://nvd.nist.gov/vuln/detail/CVE-2021-24622

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C