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TI-2023-21361 Aliases CVE-2023-40556GHSA-4545-jvqf-cxg8

WordPress Schedule Posts Calendar Plugin <= 5.2 is vulnerable to Cross Site Request Forgery (CSRF)

Priority LOW 38CWE-352Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Tampering
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-352.

Summary

Cross-Site Request Forgery (CSRF) vulnerability in Greg Ross Schedule Posts Calendar plugin <= 5.2 versions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00256 17th 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

VendorProductAffected versionsFixed inStatusSource
Greg RossSchedule Posts Calendarup to 5.2—No fix listedCNA
  • Schedule Posts Calendar VendorGreg Ross Affected up to 5.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:toolstack:schedule_posts_calendar:*:*:*:*:*:wordpress:*:*up to 5.2VulnerableToolstack
  • cpe:2.3:a:toolstack:schedule_posts_calendar:*:*:*:*:*:wordpress:*:* Versions up to 5.2 Vulnerable ·Toolstack

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40556
  2. 2026-10-03 Alias added: GHSA-4545-jvqf-cxg8

References

Advisory 1

  • TI-2024-37220 WordPress Just Writing Statistics plugin <= 4.7 - SQL Injection vulnerability CVSS 3.1HIGH 7.6
  • TI-2025-11089 CYAN Backup <= 2.5.4 - Authenticated (Admin+) Arbitrary File Deletion CVSS 3.1MEDIUM 6.5
  • TI-2024-08768 Auto iFrame <= 1.7 - Authenticated (Author+) Stored Cross-Site Scripting via tag Parameter CVSS 3.1MEDIUM 6.4
  • TI-2024-23510 WordPress Just Writing Statistics plugin <= 4.5 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 5.9
  • TI-2024-35061 WordPress CYAN Backup plugin <= 2.5.3 - Arbitrary File Download vulnerability CVSS 3.1MEDIUM 4.9
  • TI-2025-22073 WordPress Just Writing Statistics plugin <= 5.3 - Broken Access Control vulnerability CVSS 3.1MEDIUM 4.3

Sources

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