All vulnerabilities
CVE-2026-14933

Unblu Spark Cross-Site Scripting in Embedded Co-Browsing

Unblu inc. Unblu Spark
Open in ThreatlineRecord JSON
CVSS
8.6High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.56%Chance of exploitation activity in the next 30 days, higher than 45% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published20 Oct 2026Updated 20 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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.

Text from CVE List

Affected versions 6

  • Unblu Sparkunaffected: 8.35.2-hotfix.0 before 8.35.2CVE List
  • Unblu Sparkunaffected: 8.37.2-hotfix.2 before 8.37.2CVE List
  • Unblu Sparkunaffected: 8.38.2-hotfix.0 before 8.38.2CVE List
  • Unblu Sparkaffected: 7.0 through 7.57.7CVE List
  • Unblu Sparkaffected: 8.0 through 8.39.2CVE List
  • Unblu Sparkunaffected: 8.39.3CVE List

References 1