PT-2023-28608 · WordPress · Embedpress

István Márton + 1 · Published 2023-08-10 · Updated 2023-08-15 · CVE-2023-4283

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions EmbedPress plugin for WordPress versions up to, and including, 3.8.2

Description The issue is related to Stored Cross-Site Scripting via the 'embedpress calendar' shortcode due to insufficient input sanitization and output escaping on user-supplied attributes. This allows 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.

Recommendations For EmbedPress plugin for WordPress versions up to, and including, 3.8.2, update to a version later than 3.8.2 to resolve the issue. As a temporary workaround, consider restricting access to the 'embedpress calendar' shortcode for users with contributor-level and above permissions until a patch is available.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-4283

Affected Products

Embedpress

References · 7

• https://osv.dev/vulnerability/CVE-2023-4283 · Vendor Advisory
• https://plugins.trac.wordpress.org/browser/embedpress/tags/3.8.2/EmbedPress/ThirdParty/Googlecalendar/Embedpress_Google_Helper.php#L522 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-4283 · Security Note
• https://plugins.trac.wordpress.org/changeset/2950211/embedpress#file18 · Patch
• https://t.me/cibsecurity/68194 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/b340eda1-e9d2-40b6-89f9-41d995ce3555?source=cve · Note
• https://twitter.com/VulmonFeeds/status/1689650806914727936 · Twitter Post