CVE-2021-24443

Youzify <= 1.0.6 - Stored Cross-Site Scripting

2021-06-28 00:00
Phu Tran

Strategic Overview

Status
Patched in 1.0.7
Affected Plugin
Youzify – BuddyPress Community, User Profile, Social Network & Membership Plugin for WordPress
Affected Version
<= 1.0.6
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24443
View all Youzify – BuddyPress Community, User Profile, Social Network & Membership Plugin for WordPress vulnerabilities

At a glance

CVE-2021-24443 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Youzify WordPress plugin, affecting versions <= 1.0.6. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 1.0.7; sites on affected versions should update now. Disclosed June 2021, reported by Phu Tran.

Vulnerability Overview

The About Me widget of the Youzify – BuddyPress Community, User Profile, Social Network & Membership WordPress plugin before 1.0.7 does not properly sanitise its Biography field, allowing any authenticated user to set Cross-Site Scripting payloads in it, which will be executed when viewing the affected user profile. This could allow a low privilege user to gain unauthorised access to the admin side of the blog by targeting an admin, inducing them to view their profile with a malicious payload adding a rogue account for example.

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 Youzify <= 1.0.6 takes a caller who can reach the endpoint. 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 Youzify the fix is 1.0.7: builds <= 1.0.6 are affected, anything from 1.0.7 onward is not.

Remediation

Update to version 1.0.7, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Youzify: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Youzify 1.0.7 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24443https://www.wordfence.com/threat-intel/vulnerabilities/id/ac8a8698-0f8d-4204-8539-ce129d98b2b4https://nvd.nist.gov/vuln/detail/CVE-2021-24443

Related records

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