CVE-2026-14933 Unblu inc. Unblu Spark - Stored XSS

Unblu inc. Unblu Spark 7.0 through 7.57.7 and 8.0 through 8.39.2 contain a stored XSS caused by improper sanitization of co-browsed page content in the embedded co-browsing feature, letting unauthenticated remote attackers in visitor role execute arbitrary JavaScript in agent's browser, exploit requires agent to join attacker's co-browsing session.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Stored XSS
Impact
Client Script Exec
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
20 October 2026
Updated
20 October 2026
Weakness
CWE-79

Vendor fix

Update to the latest version beyond 8.39.2 or apply vendor patches addressing this issue.

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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