CVE-2023-6877 : The RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Vide

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.

Published 2024-04-07 02:15:07

Updated 2025-01-14 20:36:35

Source Wordfence

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2023-6877

Themeisle » Rss Aggregator By Feedzy » For Wordpress
Versions before (<) 4.3.4
cpe:2.3:a:themeisle:rss_aggregator_by_feedzy:*:*:*:*:*:wordpress:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2023-6877

EPSS FAQ

0.35%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 56 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-6877

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	2.3	2.7	NIST	2025-01-14
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
6.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N	3.1	2.7	Wordfence	2024-04-07
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2023-6877

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

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2023-6877

https://plugins.trac.wordpress.org/changeset/3012849/feedzy-rss-feeds

Changeset 3012849 for feedzy-rss-feeds – WordPress Plugin Repository
Patch
https://www.wordfence.com/threat-intel/vulnerabilities/id/7d25e85f-28f7-4cc5-9856-25cc5aaf1418?source=cve

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
Vendor Advisory

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Vulnerability Details : CVE-2023-6877

Products affected by CVE-2023-6877

Exploit prediction scoring system (EPSS) score for CVE-2023-6877

CVSS scores for CVE-2023-6877

CWE ids for CVE-2023-6877

References for CVE-2023-6877