Strategic Overview
- Status
- Patched in 1.31
- Affected Plugin
- RSS for Yandex Turbo
- Affected Version
<= 1.30- CVSS
- 5.5Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24428
At a glance
CVE-2021-24428 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the RSS for Yandex Turbo WordPress plugin, affecting versions <= 1.30. It carries a CVSS score of 5.5 (reachable over the network; low attack complexity). The issue is fixed in version 1.31; sites on affected versions should update now. Disclosed April 2021, reported by R3N0.
Vulnerability Overview
The RSS for Yandex Turbo WordPress plugin through 1.30 does not sanitise or escape some of its settings before saving and outputing them in the admin dashboard, leading to an Authenticated Stored Cross-Site Scripting issue 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 RSS for Yandex Turbo <= 1.30 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 RSS for Yandex Turbo the fix is 1.31: builds <= 1.30 are affected, anything from 1.31 onward is not.
Remediation
Update to version 1.31, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to RSS for Yandex Turbo: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: RSS for Yandex Turbo 1.31 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
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