CVE-2026-104000

7.2High

Published 16 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

7.2High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Limited impact
Weakness: CWE-79

Impact

Unauthenticated attackers can inject persistent scripts into debug logs over the network. These execute in an administrator's browser session when they view the debug-log viewer.

Root cause

The 'status' parameter is stored in debug logs and displayed without input sanitization or output escaping.

Affected systems

Simply Schedule Appointments plugin for WordPress up to and including 1.6.12.35

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Fix & remediation

Upgrade Simply Schedule Appointments to a version higher than 1.6.12.35. If patching must wait, disable the plugin or disable debug logging.

shell

$ wp plugin update simply-schedule-appointments

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

The Simply Schedule Appointments plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'status' parameter in all versions up to, and including, 1.6.12.35 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The malicious payload is stored unconditionally because debug logging is enabled by default, and the debug-log viewer is accessible to anyone holding the site-wide Support PIN (an HMAC-MD5 of AUTH_SALT displayed in wp-admin), meaning the injected script will execute against the administrator's session during ordinary support or troubleshooting workflows.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-104000