Unauthenticated stored XSS in Community Events via event submission form
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
The Community Events WordPress plugin from 1.4.9 before 1.6.0 does not check authorisation or nonces when processing public event submissions, and does not escape several submitted values before output. An unauthenticated attacker can submit a crafted event that runs scripts in the browser of an administrator who reviews the submission (CWE-79). The exploit is linked in the references but the flaw is not in CISA KEV.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The Community Events WordPress plugin before 1.6.0 does not have authorisation or nonce checks when processing public event submissions, and does not escape several of the submitted values before outputting them in the administration dashboard and on the public calendar, allowing unauthenticated users to inject arbitrary web scripts that will execute in the browser of an administrator reviewing the submission.
Why it matters now
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 |
|---|---|---|---|---|---|
| Unknown | Community Events | 1.4.9 to before 1.6.0 | 1.6.0 | Patch available | CNA |
- Community Events VendorUnknown Affected 1.4.9 to before 1.6.0 Fixed in 1.6.0 Patch available CNA
Remediation
Update Community Events to version 1.6.0, which fixes the flaw.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA Community Events (Unknown) Fixed in 1.6.0
Timeline
- 2026-10-29 Threatist record created from CVE-2026-86794
- 2026-10-29 Alias added: GHSA-55j7-9hpq-4p98
- 2026-10-29 CVSS score added · CISA ADP
- 2026-10-29 Weakness changed · CISA ADP
- 2026-10-29 CISA SSVC decision points changed
References
Sources
- CVE-2026-86794 · CVE Program
- CVE-2026-86794 · NVD
- FIRST EPSS
- GHSA-55j7-9hpq-4p98 · 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