What’s Vulnerable › Vulnerabilities

CVE-2023-3956: InstaWP Connect <= 0.0.9.18 - Missing Authorization to Unauthenticated Post/Taxonomy/User Add/Change/Delete, Customizer Setting Change, Plugin Installation/Activation/Deactication via events_receiver

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-27 · updated 2026-06-17
• Weakness: CWE-862

Description

The InstaWP Connect plugin for WordPress is vulnerable to unauthorized access of data, modification of data and loss of data due to a missing capability check on the 'events_receiver' function in versions up to, and including, 0.0.9.18. This makes it possible for unauthenticated attackers to add, modify or delete post and taxonomy, install, activate or deactivate plugin, change customizer settings, add or modify or delete user including administrator user.

Affected products

• InstaWP Connect: through 0.0.9.18

References

• https://plugins.trac.wordpress.org/browser/instawp-connect/tags/0.0.9.18/includes/class-instawp-rest-apis.php#L103
• https://plugins.trac.wordpress.org/changeset/2942363/instawp-connect#file5
• https://www.wordfence.com/threat-intel/vulnerabilities/id/48e7acf2-61d4-4762-8657-0701910ce69b?source=cve
• https://plugins.trac.wordpress.org/browser/instawp-connect/tags/0.0.9.18/includes/class-instawp-rest-apis.php#L103
• https://plugins.trac.wordpress.org/changeset/2942363/instawp-connect#file5
• https://www.wordfence.com/threat-intel/vulnerabilities/id/48e7acf2-61d4-4762-8657-0701910ce69b?source=cve

Get alerted when CVE-2023-3956 or the next vulnerability affects your stack