CVE-2021-24988: WP RSS Aggregator < 4.19.3 - Subscriber+ Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-27 · updated 2026-06-17
Weakness: CWE-79

Description

The WP RSS Aggregator WordPress plugin before 4.19.3 does not sanitise and escape data before outputting it in the System Info admin dashboard, which could lead to a Stored XSS issue due to the wprss_dismiss_addon_notice AJAX action missing authorisation and CSRF checks, allowing any authenticated users, such as subscriber to call it and set a malicious payload in the addon parameter.

Affected products

WP RSS Aggregator – News Feeds, Autoblogging, Youtube Video Feeds and More: before 4.19.3 — fixed in 4.19.3

How to fix

Upgrade to a fixed version: WP RSS Aggregator – News Feeds, Autoblogging, Youtube Video Feeds and More 4.19.3. Check the vendor advisory for mitigations.

References

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