WordPress WP FullCalendar plugin <= 1.5 - Cross Site Scripting (XSS) vulnerability
Priority LOW 29CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Marcus (aka @msykes) WP FullCalendar wp-fullcalendar allows Stored XSS.This issue affects WP FullCalendar: from n/a through <= 1.5.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00307 23rd 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 |
|---|---|---|---|---|---|
| Marcus (aka @msykes) | WP FullCalendar | up to 1.5 | — | No fix listed | CNA |
- WP FullCalendar VendorMarcus (aka @msykes) Affected up to 1.5 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-22261
- 2026-10-03 Alias added: GHSA-5gq4-27hv-48vf
More Marcus (aka @msykes) vulnerabilities
- TI-2026-41537 WordPress Events Manager plugin <= 7.3.6 - PHP Object Injection vulnerability CVSS 3.1HIGH 8.8
- TI-2026-17933 WordPress WP FullCalendar plugin <= 1.6 - Broken Access Control vulnerability CVSS 3.1HIGH 7.5
- TI-2026-19764 WordPress WP FullCalendar plugin <= 1.6 - Sensitive Data Exposure vulnerability CVSS 3.1MEDIUM 5.3
- TI-2025-01068 WordPress Events Manager plugin <= 6.6.4.1 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
- TI-2026-47311 WordPress Login With Ajax plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
- TI-2025-16165 WordPress Meta Tag Manager plugin <= 3.1 - Broken Access Control vulnerability CVSS 3.1MEDIUM 4.3
Sources
- CVE-2025-22261 · CVE Program
- CVE-2025-22261 · NVD
- FIRST EPSS
- GHSA-5gq4-27hv-48vf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences