{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55085",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T14:41:54.578Z",
        "datePublished": "2026-08-19T19:34:27.269Z",
        "dateUpdated": "2026-08-21T19:47:13.022Z"
    },
    "containers": {
        "cna": {
            "title": "Etherpad: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in etherpad-lite",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 9.6,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/ether/etherpad/security/advisories/GHSA-f7h5-v9hm-548j",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/ether/etherpad/security/advisories/GHSA-f7h5-v9hm-548j"
                },
                {
                    "name": "https://github.com/ether/etherpad/pull/7937",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ether/etherpad/pull/7937"
                },
                {
                    "name": "https://github.com/ether/etherpad/commit/d828185efcac9abc2e46e6da1c171393500fa319",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ether/etherpad/commit/d828185efcac9abc2e46e6da1c171393500fa319"
                },
                {
                    "name": "https://github.com/ether/etherpad/releases/tag/v3.3.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ether/etherpad/releases/tag/v3.3.1"
                }
            ],
            "affected": [
                {
                    "vendor": "ether",
                    "product": "etherpad",
                    "versions": [
                        {
                            "version": "< 3.3.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-19T19:34:27.269Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in src/node/utils/ImportEtherpad.ts accepts attacker-controlled attribute-pool values from a crafted .etherpad import, including list:number1 and a malicious start value. Any user with write access to a pad can store markup that executes as cross-site scripting when another user opens the pad or /timeslider, including when an administrator views the pad. This issue is fixed in version 3.3.1."
                }
            ],
            "source": {
                "advisory": "GHSA-f7h5-v9hm-548j",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/ether/etherpad/security/advisories/GHSA-f7h5-v9hm-548j",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-21T19:46:45.454820Z",
                                "id": "CVE-2026-55085",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "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": "2026-08-21T19:47:13.022Z"
                }
            }
        ]
    }
}