TI-2024-07925 Aliases CVE-2024-8549 GHSA-3hq4-wjf7-pw99

Simple Calendar – Google Calendar Plugin <= 3.4.2 - Reflected Cross-Site Scripting

LOW 28CWE-79Published 2024-09-25 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Simple Calendar – Google Calendar Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 3.4.2. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00491 42nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Simple Calendar	Simple Calendar – Google Calendar Plugin	up to 3.4.2	—	No fix listed	CNA

Simple Calendar – Google Calendar Plugin VendorSimple Calendar Affected up to 3.4.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:xtendify:simple_calendar::::::wordpress::*	before 3.4.3	Vulnerable	WofficeIO

cpe:2.3:a:xtendify:simple_calendar:*:*:*:*:*:wordpress:*:* Versions before 3.4.3 Vulnerable ·WofficeIO

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-8549
2026-10-03 Alias added: GHSA-3hq4-wjf7-pw99

References

Patch 2

Advisory 1

https://www.wordfence.com/threat-intel/vulnerabilities/id/17ae3f22-6426-48f7-93e6-c0ad515b329a?source=cve

TI-2025-42435 WordPress Google Calendar Events plugin <= 3.5.9 - Insecure Direct Object References (IDOR) vulnerability CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences