CampaignEvents API missing authorization exposes meeting and chat URLs
Priority LOW 30CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.
Summary
Missing Authorization vulnerability in Wikimedia Foundation MediaWiki - CampaignEvents extension allows Privilege Abuse.This issue affects MediaWiki - CampaignEvents extension: 1.45, 1.44, 1.43, 1.39.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00272 19th 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
- Yes
- 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 |
|---|---|---|---|---|---|
| Wikimedia Foundation | MediaWiki - CampaignEvents extension | 1.45; 1.44; 1.43; 1.39 | — | No fix listed | CNA |
- MediaWiki - CampaignEvents extension VendorWikimedia Foundation Affected 1.45; 1.44; 1.43; 1.39 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wikimedia:campaignevents:1.39:*:*:*:*:mediawiki:*:* | 1.39 | Vulnerable | Wikimedia Foundation |
| cpe:2.3:a:wikimedia:campaignevents:1.43:*:*:*:*:mediawiki:*:* | 1.43 | Vulnerable | Wikimedia Foundation |
| cpe:2.3:a:wikimedia:campaignevents:1.44:*:*:*:*:mediawiki:*:* | 1.44 | Vulnerable | Wikimedia Foundation |
| cpe:2.3:a:wikimedia:campaignevents:1.45:*:*:*:*:mediawiki:*:* | 1.45 | Vulnerable | Wikimedia Foundation |
- cpe:2.3:a:wikimedia:campaignevents:1.39:*:*:*:*:mediawiki:*:* Versions 1.39 Vulnerable ·Wikimedia Foundation
- cpe:2.3:a:wikimedia:campaignevents:1.43:*:*:*:*:mediawiki:*:* Versions 1.43 Vulnerable ·Wikimedia Foundation
- cpe:2.3:a:wikimedia:campaignevents:1.44:*:*:*:*:mediawiki:*:* Versions 1.44 Vulnerable ·Wikimedia Foundation
- cpe:2.3:a:wikimedia:campaignevents:1.45:*:*:*:*:mediawiki:*:* Versions 1.45 Vulnerable ·Wikimedia Foundation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-0817
- 2026-10-03 Alias added: GHSA-5v56-6x55-vhpv
References
Sources
- CVE-2026-0817 · CVE Program
- CVE-2026-0817 · NVD
- FIRST EPSS
- GHSA-5v56-6x55-vhpv · 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