CVE-2023-4283 : The EmbedPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting

The EmbedPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'embedpress_calendar' shortcode in versions up to, and including, 3.8.2 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Published 2023-08-10 12:15:12

Updated 2023-08-15 20:01:19

Source Wordfence

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2023-4283

Wpdeveloper » Embedpress » For Wordpress
Versions up to, including, (<=) 3.8.2
cpe:2.3:a:wpdeveloper:embedpress:*:*:*:*:*:wordpress:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2023-4283

EPSS FAQ

0.06%

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

~ 28 %

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

CVSS scores for CVE-2023-4283

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
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
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
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2023-4283

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: security@wordfence.com (Primary)

References for CVE-2023-4283

https://plugins.trac.wordpress.org/changeset/2950211/embedpress#file18

Changeset 2950211 for embedpress – WordPress Plugin Repository
Patch

CVEs referencing this url
https://plugins.trac.wordpress.org/browser/embedpress/tags/3.8.2/EmbedPress/ThirdParty/Googlecalendar/Embedpress_Google_Helper.php#L522

Embedpress_Google_Helper.php in embedpress/tags/3.8.2/EmbedPress/ThirdParty/Googlecalendar – WordPress Plugin Repository
Patch
https://www.wordfence.com/threat-intel/vulnerabilities/id/b340eda1-e9d2-40b6-89f9-41d995ce3555?source=cve

EmbedPress <= 3.8.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
Third Party Advisory

Jump to

Vulnerability Details : CVE-2023-4283

Products affected by CVE-2023-4283

Exploit prediction scoring system (EPSS) score for CVE-2023-4283

CVSS scores for CVE-2023-4283

CWE ids for CVE-2023-4283

References for CVE-2023-4283