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Vulnerability record · CVE-2026-81807 · published 2 September 2026

CVE-2026-81807: Cross-site scripting vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.51% · top 59.3% CWE-79 · Cross-site scripting Deferred
8.8CVSS 3.1 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
3 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://wpscan.com/vulnerability/7aceefd5-aa09-4828-b375-6a62997fa0c2/

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Source: NIST National Vulnerability Database (record CVE-2026-81807), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.