Five9 Live Chat <= 1.1.2 - Authenticated (Contributor+) Stored Cross-Site Scripting
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- 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 Five9 Live Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'toolbar' attribute of the [five9-chat] shortcode in all versions up to, and including, 1.1.2. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-11829
- 2026-10-03 Alias added: GHSA-g46h-r8hj-w7cg
References
More five9 vulnerabilities
- TI-2018-11062 Five9 Agent Desktop Plus 10.0.70 has Incorrect Access Control (issue 2 of 2). CVSS 3.0CRITICAL 9.8
- TI-2018-11061 Five9 Agent Desktop Plus 10.0.70 has Incorrect Access Control allowing a remote attackers… CVSS 3.0HIGH 7.5
Sources
- CVE-2025-11829 · CVE Program
- CVE-2025-11829 · NVD
- FIRST EPSS
- GHSA-g46h-r8hj-w7cg · 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