Unblu Spark XSS in co-browsing (v7.0-7.57.7/v8.0-8.39.2)
CVE-2026-14933 Published on October 20, 2026
Unblu Spark Cross-Site Scripting in Embedded Co-Browsing
Cross-site scripting in the embedded co-browsing feature in Unblu inc. Unblu Spark 7.0 through 7.57.7 and 8.0 through 8.39.2, on on-premises and cloud deployments, allows an unauthenticated remote attacker in the visitor role to execute arbitrary JavaScript in the browser of an agent taking part in the attacker's co-browsing session, via content of the co-browsed page that the agent's browser renders as HTML.
The JavaScript runs in the context and under the identity of the agent's session in the Agent Desk or the Single Conversation Desk.
Exploitation requires an agent to join an embedded co-browsing session with the attacker. Mobile co-apping isn't affected.
Vulnerability Analysis
CVE-2026-14933 can be exploited with network access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-14933 has been classified to as a XSS vulnerability or weakness.
Affected Versions
Unblu inc. Unblu Spark:- Version 8.35.2-hotfix.0 and below 8.35.2 is unaffected.
- Version 8.37.2-hotfix.2 and below 8.37.2 is unaffected.
- Version 8.38.2-hotfix.0 and below 8.38.2 is unaffected.
- Version 7.0, <= 7.57.7 is affected.
- Version 8.0, <= 8.39.2 is affected.
- Version 8.39.3 is unaffected.