LinkAce – Stored XSS via Unsanitized SSO User’s Name Rendered in Admin Audit Log Allows Session Hijacking_CVE-2026-45343

{
    "lastseen": "",
    "description": "LinkAce is a self-hosted archive to collect website links. Prior to 2.5.6, LinkAce contains a stored cross-site scripting vulnerability that allows a low-privilege user to execute arbitrary JavaScript in an administrator's browser session. This affects instances configured with SSO/OAuth authentication, which is one of the supported authentication methods in LinkAce. An attacker who sets their OAuth display name to a malicious script and then creates an API token will plant a persistent XSS payload in the audit log. When any admin navigates to /system/audit, the payload executes in the admin's browser context. This enables session cookie theft, CSRF token exfiltration (exposed in the la-app-data meta tag), or any other action the admin can perform. This vulnerability is fixed in 2.5.6.",
    "published": "2026-05-28T20:45:51.518Z",
    "modified": "2026-05-28T20:45:51.518Z",
    "type": "cve",
    "title": "LinkAce - Stored XSS via Unsanitized SSO User's Name Rendered in Admin Audit Log Allows Session Hijacking",
    "source": "GitHub_M",
    "references": "https://github.com/Kovah/LinkAce/security/advisories/GHSA-jx4g-ph82-x9mm",
    "id": "CVE-2026-45343",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "Kovah LinkAce < 2.5.6",
    "sourceHref": "",
    "cvss": {
        "score": 8.5,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "LinkAce",
    "version": "< 2.5.6",
    "vendor": "Kovah",
    "ai_description": "Stored cross-site scripting vulnerability in LinkAce prior to 2.5.6, allowing low-privilege users to execute arbitrary JavaScript in an administrator's browser session.",
    "ai_severity": "High",
    "ai_vendor": "Kovah",
    "ai_product": "LinkAce",
    "ai_version": "< 2.5.6",
    "ai_score": 8.5
}