PHP Event Calendar through 2021-11-04 allows persistent cross-site scripting (XSS), as…
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 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
PHP Event Calendar through 2021-11-04 allows persistent cross-site scripting (XSS), as demonstrated by the /server/ajax/events_manager.php title parameter. This can be exploited by an adversary in multiple ways, e.g., to perform actions on the page in the context of other users, or to deface the site.
Why it matters now
EPSS 0.00893 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
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:php_event_calendar_project:php_event_calendar:2021-11-04:*:*:*:lite:*:*:* | 2021-11-04 | Vulnerable | Php Event Calendar Project |
- cpe:2.3:a:php_event_calendar_project:php_event_calendar:2021-11-04:*:*:*:lite:*:*:* Versions 2021-11-04 Vulnerable ·Php Event Calendar Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-42078
- 2026-10-03 Alias added: GHSA-xf8q-53qc-c4vp
References
Sources
- CVE-2021-42078 · CVE Program
- CVE-2021-42078 · NVD
- FIRST EPSS
- GHSA-xf8q-53qc-c4vp · GitHub Advisory Database · CC BY 4.0
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