Strategic Overview
- Status
- Patched in 5.0.4
- Affected Plugin
- Team Members
- Affected Version
< 5.0.4- CVSS
- 6.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24128
At a glance
CVE-2021-24128 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Team Members WordPress plugin, affecting versions < 5.0.4. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 5.0.4; sites on affected versions should update now. Disclosed May 2020, reported by minhtuanact.
Vulnerability Overview
Unvalidated input and lack of output encoding in the Team Members WordPress plugin, versions before 5.0.4, lead to Cross-site scripting vulnerabilities allowing medium-privileged authenticated attacker (contributor+) to inject arbitrary web script or HTML via the 'Description/biography' of a member.
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 Team Members < 5.0.4 takes any authenticated account. 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 Team Members the fix is 5.0.4: builds < 5.0.4 are affected, anything from 5.0.4 onward is not.
Remediation
Update to version 5.0.4, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Team Members: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Team Members 5.0.4 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
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