Cross-site scripting in k5n.us WebCalendar
Priority LOW 29CWE-79Published · Updated
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 3.0 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Cross-site scripting vulnerability in WebCalendar 1.2.7 and earlier allows an attacker to inject arbitrary web script or HTML via unspecified vectors.
Why it matters now
EPSS 0.00934 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| k5n.us | WebCalendar | up to 1.2.7 | — | No fix listed | CNA |
- WebCalendar Vendork5n.us Affected up to 1.2.7 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:webcalendar_project:webcalendar:1.2.7:*:*:*:*:*:*:* | 1.2.7 | Vulnerable | Webcalendar Project |
- cpe:2.3:a:webcalendar_project:webcalendar:1.2.7:*:*:*:*:*:*:* Versions 1.2.7 Vulnerable ·Webcalendar Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-10840
- 2026-10-03 Alias added: GHSA-rg28-qhrf-c54c
References
More Webcalendar Project Webcalendar vulnerabilities
- TI-2012-01308 install/index.php in WebCalendar before 1.2.5 allows remote attackers to execute… CVSS 3.1CRITICAL 9.8
- TI-2024-15086 WebCalendar v1.3.0 was discovered to contain a reflected cross-site scripting (XSS)… CVSS 3.1MEDIUM 6.1
- TI-2023-00274 Cross-site Scripting (XSS) - Stored in craigk5n/webcalendar CVSS 3.1MEDIUM 5.4
- TI-2012-01309 Local file inclusion in WebCalendar before 1.2.5. CVSS 3.1HIGH 8.8
- TI-2012-04558 install/index.php in Craig Knudsen WebCalendar before 1.2.5 allows remote attackers to… CVSS 2.0HIGH 7.5
- TI-2017-07942 Path traversal in k5n.us WebCalendar CVSS 3.0MEDIUM 4.9
Sources
- CVE-2017-10840 · CVE Program
- CVE-2017-10840 · NVD
- FIRST EPSS
- GHSA-rg28-qhrf-c54c · GitHub Advisory Database · CC BY 4.0
- CVE-2017-10840 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences