WP LMS – Best WordPress LMS Plugin <= 1.1.5 - Cross-Site Scripting
Strategic Overview
- Status
- Patched in 1.1.6
- Affected Plugin
- WP Learn Manager
- Affected Version
<= 1.1.5- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24504
At a glance
CVE-2021-24504 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WP Learn Manager WordPress plugin, affecting versions <= 1.1.5. 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 1.1.6; sites on affected versions should update now. Disclosed May 2021, reported by Mohammed Adam.
Vulnerability Overview
The WP LMS – Best WordPress LMS Plugin WordPress plugin through 1.1.5 does not properly sanitise or validate its User Field Titles, allowing XSS payload to be used in them. Furthermore, no CSRF and capability checks were in place, allowing such attack to be performed either via CSRF or as any user (including unauthenticated).
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 WP Learn Manager <= 1.1.5 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 WP Learn Manager the fix is 1.1.6: builds <= 1.1.5 are affected, anything from 1.1.6 onward is not.
Remediation
Update to version 1.1.6, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to WP Learn Manager: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WP Learn Manager 1.1.6 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in WP Learn Manager
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