CVE-2026-14933 (GCVE-0-2026-14933)

Vulnerability from cvelistv5 – Published: 2026-10-20 11:08 – Updated: 2026-10-20 11:08
VLAI
Title
Unblu Spark Cross-Site Scripting in Embedded Co-Browsing
Summary
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.
Severity
8.6 (High)
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
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
NCSC.ch CNA under the mitre root
CNA scorecard B 80/100 over 76 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Unblu inc. Unblu Spark Unaffected: 8.35.2-hotfix.0 , < 8.35.2 (semver)
Unaffected: 8.37.2-hotfix.2 , < 8.37.2 (semver)
Unaffected: 8.38.2-hotfix.0 , < 8.38.2 (semver)
Affected: 7.0 , ≤ 7.57.7 (semver)
Affected: 8.0 , ≤ 8.39.2 (semver)
Unaffected: 8.39.3
guessed Create a notification for this product.
Credits
Kenan Karalioglu (chef_shell) via YesWeHack
Show details on NVD website
To clipboard 

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              "value": "\u003cp\u003eCross-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\u0027s co-browsing session, via content of the co-browsed page that the agent\u0027s browser renders as HTML.\u003c/p\u003e\u003cp\u003eThe JavaScript runs in the context and under the identity of the agent\u0027s session in the Agent Desk or the Single Conversation Desk.\u003c/p\u003e\u003cp\u003eExploitation requires an agent to join an embedded co-browsing session with the attacker. Mobile co-apping isn\u0027t affected.\u003c/p\u003e"
            }
          ],
          "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\u0027s co-browsing session, via content of the co-browsed page that the agent\u0027s browser renders as HTML.\n\n\n\nThe JavaScript runs in the context and under the identity of the agent\u0027s 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\u0027t affected."
        }
      ],
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              "value": "CAPEC-588 DOM-Based XSS"
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            "Recovery": "NOT_DEFINED",
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            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
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      "providerMetadata": {
        "dateUpdated": "2026-10-20T11:08:43.830Z",
        "orgId": "455daabc-a392-441d-aa46-37d35189897c",
        "shortName": "NCSC.ch"
      },
      "references": [
        {
          "name": "Unblu Security Advisories",
          "tags": [
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          "url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-004"
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              "value": "\u003cp\u003eUpgrade 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.\u003c/p\u003e\u003cp\u003eUnblu Cloud customers needn\u0027t take any action. The fix is already deployed in Unblu Cloud.\u003c/p\u003e\u003cp\u003eFor a workaround for on-premises deployments that can\u0027t be upgraded immediately, see the security bulletin.\u003c/p\u003e"
            }
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          "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\u0027t take any action. The fix is already deployed in Unblu Cloud.\n\n\n\nFor a workaround for on-premises deployments that can\u0027t be upgraded immediately, see the security bulletin."
        }
      ],
      "source": {
        "advisory": "UBL-2026-004",
        "discovery": "EXTERNAL"
      },
      "title": "Unblu Spark Cross-Site Scripting in Embedded Co-Browsing",
      "x_generator": {
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    "cveId": "CVE-2026-14933",
    "datePublished": "2026-10-20T11:08:43.830Z",
    "dateReserved": "2026-07-07T10:56:24.163Z",
    "dateUpdated": "2026-10-20T11:08:43.830Z",
    "state": "PUBLISHED"
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          }
        ],
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}



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