LoginWP < 3.0.0.5 - Reflected Cross-Site Scripting via rul_login_url, rul_logout_url Parameter
Strategic Overview
- Status
- Patched in 3.0.0.5
- Affected Plugin
- LoginWP (Formerly Peter's Login Redirect)
- Affected Version
< 3.0.0.5- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24939
At a glance
CVE-2021-24939 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the LoginWP (Formerly Peter's Login Redirect) WordPress plugin, affecting versions < 3.0.0.5. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.0.0.5; sites on affected versions should update now. Disclosed November 2021, reported by ZhongFu Su.
Vulnerability Overview
The LoginWP (Formerly Peter's Login Redirect) WordPress plugin before 3.0.0.5 does not sanitise and escape the rul_login_url and rul_logout_url parameter before outputting them back in attributes in an admin page, leading to a Reflected Cross-Site Scripting issue
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 privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in LoginWP (Formerly Peter's Login Redirect) < 3.0.0.5 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 LoginWP (Formerly Peter's Login Redirect) the fix is 3.0.0.5: builds < 3.0.0.5 are affected, anything from 3.0.0.5 onward is not.
Remediation
Update to version 3.0.0.5, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to LoginWP (Formerly Peter's Login Redirect): WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: LoginWP (Formerly Peter's Login Redirect) 3.0.0.5 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in LoginWP (Formerly Peter's Login Redirect)
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