CVE-2026-101127 Joomla Balbooa Forms - Stored XSS

Balbooa Forms < 2.4.3.4 contains a stored XSS caused by storing attacker-supplied original multipart filename verbatim in submission attachments, letting unauthenticated attackers execute script when admin views submission, exploit requires admin to open submission.

CVSS base score 9.4 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.33% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 2.4.3.4 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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