CVE-2026-105798 SimpleChat - Stored XSS

SimpleChat < 0.261.029 contains a stored XSS caused by improper escaping of attacker-controlled group document filenames in group_workspaces.html, letting authenticated group Owner, Admin, or DocumentManager execute scripts in victim sessions when Share is clicked.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 0.261.029 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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