Vulnerability-Lookup

GHSA-9P8H-2662-3XVR

Vulnerability from github – Published: 2026-10-20 12:31 – Updated: 2026-10-20 12:31

Details

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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-14933"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-20T12:17:30Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-9p8h-2662-3xvr",
  "modified": "2026-10-20T12:31:38Z",
  "published": "2026-10-20T12:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14933"
    },
    {
      "type": "WEB",
      "url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-004"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-10-20 11:08 – Updated: 2026-10-20 15:28

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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-20 15:28 UTC

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

1 reference

URL	Tags
https://docs.unblu.com/latest/security-bulletins/…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
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

Credits

Kenan Karalioglu (chef_shell) via YesWeHack

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-14933",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-20T15:28:00.378931Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-20T15:28:15.051Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "On-premises",
            "Cloud"
          ],
          "product": "Unblu Spark",
          "vendor": "Unblu inc.",
          "versions": [
            {
              "lessThan": "8.35.2",
              "status": "unaffected",
              "version": "8.35.2-hotfix.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.37.2",
              "status": "unaffected",
              "version": "8.37.2-hotfix.2",
              "versionType": "semver"
            },
            {
              "lessThan": "8.38.2",
              "status": "unaffected",
              "version": "8.38.2-hotfix.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.57.7",
              "status": "affected",
              "version": "7.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.39.2",
              "status": "affected",
              "version": "8.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "8.39.3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Kenan Karalioglu (chef_shell) via YesWeHack"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-588",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-588 DOM-Based XSS"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-20T11:08:43.830Z",
        "orgId": "455daabc-a392-441d-aa46-37d35189897c",
        "shortName": "NCSC.ch"
      },
      "references": [
        {
          "name": "Unblu Security Advisories",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-004"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "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"
            }
          ],
          "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": {
        "engine": "manual"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
    "assignerShortName": "NCSC.ch",
    "cveId": "CVE-2026-14933",
    "datePublished": "2026-10-20T11:08:43.830Z",
    "dateReserved": "2026-07-07T10:56:24.163Z",
    "dateUpdated": "2026-10-20T15:28:15.051Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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