Calendar_plugin <= 1.0 Reflected Cross-Site Scripting
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 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Calendar_plugin WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of `$_SERVER['PHP_SELF']` in the ~/calendar.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00895 59th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
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 |
|---|---|---|---|---|---|
| Calendar_plugin | Calendar_plugin | 1.0 – 1.0 | — | No fix listed | CNA |
- Calendar_plugin VendorCalendar_plugin Affected 1.0 – 1.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:calendar_plugin_project:calendar_plugin:*:*:*:*:*:wordpress:*:* | up to 1.0 | Vulnerable | Calendar Plugin Project |
- cpe:2.3:a:calendar_plugin_project:calendar_plugin:*:*:*:*:*:wordpress:*:* Versions up to 1.0 Vulnerable ·Calendar Plugin Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34667
- 2026-10-03 Alias added: GHSA-r68r-w4gj-642m
References
Sources
- CVE-2021-34667 · CVE Program
- CVE-2021-34667 · NVD
- FIRST EPSS
- GHSA-r68r-w4gj-642m · 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