The Events Calendar < 6.16.5.1 - Unauthenticated Event Aggregator Import Status Manipulation
Priority MEDIUM 63CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.
Summary
The Events Calendar WordPress plugin before 6.16.5.1 does not perform an authorization check on one of its Event Aggregator import REST API routes and skips an integrity check for a particular status value, allowing unauthenticated attackers to mark existing import records as failed and to store arbitrary content in a hidden comment record.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00304 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed The Events Calendar (Unknown): 6.16.5.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| Unknown | The Events Calendar | before 6.16.5.1 | 6.16.5.1 | Patch available | CNA |
- The Events Calendar VendorUnknown Affected before 6.16.5.1 Fixed in 6.16.5.1 Patch available CNA
Remediation
- Fix · CNA The Events Calendar (Unknown) Fixed in 6.16.5.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13390
- 2026-10-03 Alias added: GHSA-h677-jwp7-x89g
References
Sources
- CVE-2026-13390 · CVE Program
- CVE-2026-13390 · NVD
- FIRST EPSS
- GHSA-h677-jwp7-x89g · 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