{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-14933", "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c", "state": "PUBLISHED", "assignerShortName": "NCSC.ch", "dateReserved": "2026-07-07T10:56:24.163Z", "datePublished": "2026-10-20T11:08:43.830Z", "dateUpdated": "2026-10-20T15:28:15.051Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "455daabc-a392-441d-aa46-37d35189897c", "shortName": "NCSC.ch", "dateUpdated": "2026-10-20T11:08:43.830Z"}, "title": "Unblu Spark Cross-Site Scripting in Embedded Co-Browsing", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-588", "descriptions": [{"lang": "en", "value": "CAPEC-588 DOM-Based XSS"}]}], "affected": [{"vendor": "Unblu inc.", "product": "Unblu Spark", "platforms": ["On-premises", "Cloud"], "versions": [{"status": "unaffected", "version": "8.35.2-hotfix.0", "lessThan": "8.35.2", "versionType": "semver"}, {"status": "unaffected", "version": "8.37.2-hotfix.2", "lessThan": "8.37.2", "versionType": "semver"}, {"status": "unaffected", "version": "8.38.2-hotfix.0", "lessThan": "8.38.2", "versionType": "semver"}, {"status": "affected", "version": "7.0", "lessThanOrEqual": "7.57.7", "versionType": "semver"}, {"status": "affected", "version": "8.0", "lessThanOrEqual": "8.39.2", "versionType": "semver"}, {"status": "unaffected", "version": "8.39.3"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.\n\n\n\nThe JavaScript runs in the context and under the identity of the agent's session in the Agent Desk or the Single Conversation Desk.\n\n\n\nExploitation requires an agent to join an embedded co-browsing session with the attacker. Mobile co-apping isn't affected.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p><p>The JavaScript runs in the context and under the identity of the agent's session in the Agent Desk or the Single Conversation Desk.</p><p>Exploitation requires an agent to join an embedded co-browsing session with the attacker. Mobile co-apping isn't affected.</p>"}]}], "references": [{"url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-004", "name": "Unblu Security Advisories", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.6, "vectorString": "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"}}], "solutions": [{"lang": "en", "value": "Upgrade to Unblu Spark 8.39.3 or later, or 7.57.9 or later. The fix is also available in 8.35.2-hotfix.0, 8.37.2-hotfix.2, 8.38.2-hotfix.0 and later hotfixes of these release lines.\n\n\n\nUnblu Cloud customers needn't take any action. The fix is already deployed in Unblu Cloud.\n\n\n\nFor a workaround for on-premises deployments that can't be upgraded immediately, see the security bulletin.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to Unblu Spark 8.39.3 or later, or 7.57.9 or later. The fix is also available in 8.35.2-hotfix.0, 8.37.2-hotfix.2, 8.38.2-hotfix.0 and later hotfixes of these release lines.</p><p>Unblu Cloud customers needn't take any action. The fix is already deployed in Unblu Cloud.</p><p>For a workaround for on-premises deployments that can't be upgraded immediately, see the security bulletin.</p>"}]}], "credits": [{"lang": "en", "value": "Kenan Karalioglu (chef_shell) via YesWeHack", "type": "finder"}], "source": {"advisory": "UBL-2026-004", "discovery": "EXTERNAL"}, "x_generator": {"engine": "manual"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-20T15:28:00.378931Z", "id": "CVE-2026-14933", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-20T15:28:15.051Z"}}]}}

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The fix is also available in 8.35.2-hotfix.0, 8.37.2-hotfix.2, 8.38.2-hotfix.0 and later hotfixes of these release lines.\n\n\n\nUnblu Cloud customers needn't take any action. The fix is already deployed in Unblu Cloud.\n\n\n\nFor a workaround for on-premises deployments that can't be upgraded immediately, see the security bulletin.", "supportingMedia": [{"type": "text/html", "value": "<p>Upgrade to Unblu Spark 8.39.3 or later, or 7.57.9 or later. The fix is also available in 8.35.2-hotfix.0, 8.37.2-hotfix.2, 8.38.2-hotfix.0 and later hotfixes of these release lines.</p><p>Unblu Cloud customers needn't take any action. The fix is already deployed in Unblu Cloud.</p><p>For a workaround for on-premises deployments that can't be upgraded immediately, see the security bulletin.</p>", "base64": false}]}], "references": [{"url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-004", "name": "Unblu Security Advisories", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "manual"}, "descriptions": [{"lang": "en", "value": "Cross-site scripting in the embedded co-browsing feature in Unblu inc. 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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.</p><p>The JavaScript runs in the context and under the identity of the agent's session in the Agent Desk or the Single Conversation Desk.</p><p>Exploitation requires an agent to join an embedded co-browsing session with the attacker. 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