Simple Ajax Chat < 20260827 - Unauthenticated Stored XSS via Chat Message Linkification
Priority MEDIUM 41CWE-79Published · Updated
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 Simple Ajax Chat WordPress plugin before 20260827 does not escape chat message content before rendering it, allowing unauthenticated users to inject arbitrary HTML attributes into the page and run scripts in the browser of anyone viewing the chat, including administrators.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00505 43rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Simple Ajax Chat (Unknown): 20260827
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 | Simple Ajax Chat | before 20260827 | 20260827 | Patch available | CNA |
- Simple Ajax Chat VendorUnknown Affected before 20260827 Fixed in 20260827 Patch available CNA
Remediation
- Fix · CNA Simple Ajax Chat (Unknown) Fixed in 20260827
Timeline
- 2026-10-02 Threatist record created from CVE-2026-81807
- 2026-10-03 Alias added: GHSA-xx7f-q66c-932r
References
Sources
- CVE-2026-81807 · CVE Program
- CVE-2026-81807 · NVD
- FIRST EPSS
- GHSA-xx7f-q66c-932r · 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