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Cross-Site Scripting in WordPress RSS Aggregator Plugin

Medium

Synopsis

A researcher at Tenable discovered a Cross-Site Scripting (XSS) vulnerability in the WordPress RSS Aggregator plugin.

The XSS exists because of a lack of sanitization of the 'notice_id'  GET parameter.

Proof Of Concept:

The vulnerability can be reproduced by performing the following GET HTTP request against a WordPress instance using a vulnerable version of the plugin and noticing the client-side JavaScript execution :

curl 'http://WORDPRESS/wp-admin/admin-ajax.php?action=wprss_admin_notice_hide&notice_id=<svg/onload=alert`1`>' -H 'Cookie: [subscriber cookie]'

Solution

The issue was fixed in WordPress RSS Aggregator Plugin version 4.23.9

Disclosure Timeline

30 April 2024 - Vulnerability discovered
02 May 2024 - Tenable requests security contact to the support email address
02 May 2024 - Vendor support acknowledges and ask for the security issue to forward to the appropriate contact
02 May 2024 - Tenable provides the security details about the vulnerability
03 May 2024 - Vendor acknowledges the security issue and works on a fix
13 May 2024 - Vendor notifies Tenable that version 4.23.9 has been released with a fix for this vulnerability

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2024-4860
Tenable Advisory ID: TRA-2024-16
Credit:
Joshua Martinelle
CVSSv3 Base / Temporal Score:
5.4 / 5.0
CVSSv3 Vector:
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Affected Products:
WordPress RSS Aggregator Plugin < 4.23.9
Risk Factor:
Medium

Advisory Timeline

May 14, 2024 - Initial release