CVE-2026-14933Unblu Spark Cross-Site Scripting in Embedded Co-Browsing
Updated under an hour ago ()
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It affects Unblu inc. Unblu Spark. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.6 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NCSC.ch
- NVD analysis
- Deferred
- Record last updated
- Oct 20, 2026
- First seen by InfoSec Signals
- Oct 20, 2026
Affected products
Unblu inc. Unblu Spark unblu:spark (from the name) | from 8.35.2-hotfix.0 before 8.35.2 not affected; from 8.37.2-hotfix.2 before 8.37.2 not affected; from 8.38.2-hotfix.0 before 8.38.2 not affected; from 7.0 through 7.57.7; from 8.0 through 8.39.2; 8.39.3 not affected | CNA record |
References
- https://docs.unblu.com/latest/security-bulletins/#UBL-2026-004vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.