What’s Vulnerable › Vulnerabilities

CVE-2024-0855: Spiffy Calendar < 4.9.9 - Broken Access Control

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-02-27 · updated 2026-06-17

Description

The Spiffy Calendar WordPress plugin before 4.9.9 doesn't check the event_author parameter, and allows any user to alter it when creating an event, leading to deceiving users/admins that a page was created by a Contributor+.

Affected products

• Spiffy Plugins Spiffy Calendar: before 4.9.9 — fixed in 4.9.9

How to fix

Upgrade to a fixed version: Spiffy Plugins Spiffy Calendar 4.9.9. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/5d5da91e-3f34-46b0-8db2-354a88bdf934/
• https://wpscan.com/vulnerability/5d5da91e-3f34-46b0-8db2-354a88bdf934/

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