CVE-2023-6877

RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Video Feeds Aggregator <= 4.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Error Message

Severity Score

6.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

The RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Video Feeds Aggregator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcode(s) in all versions up to, and including, 4.3.3 due to insufficient input sanitization and output escaping on the Content-Type field of error messages when retrieving an invalid RSS feed. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

El complemento RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Video Feeds Aggregator de WordPress es vulnerable a cross-site scripting almacenado a través de los códigos cortos del complemento en todas las versiones hasta la 4.3.3 incluida debido a sanitización de entrada insuficiente y salida que se escapa en el campo Tipo de contenido de los mensajes de error al recuperar una fuente RSS no válida. Esto hace posible que atacantes autenticados, con acceso de nivel de colaborador y superior, inyecten scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página inyectada.

*Credits: Colin Xu

CVSS Scores

Wordfencev3.1 6.4

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-12-15 CVE Reserved
2024-04-06 CVE Published
2024-04-07 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (2)

URL	Tag	Source
https://plugins.trac.wordpress.org/changeset/3012849/feedzy-rss-feeds
https://www.wordfence.com/threat-intel/vulnerabilities/id/7d25e85f-28f7-4cc5-9856-25cc5aaf1418?source=cve

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Themeisle Search vendor "Themeisle"		RSS Aggregator Search vendor "Themeisle" for product "RSS Aggregator"				<= 4.3.3 Search vendor "Themeisle" for product "RSS Aggregator" and version " <= 4.3.3"		en		Affected