mailcow: dockerized vulnerable to stored XSS in user login history real_rip_CVE-2026-40875

{
    "lastseen": "",
    "description": "mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the user dashboard's \"Seen successful connections\" (login history) renders the client IP from login logs without HTML escaping. Because the server trusts the X-Real-IP header as the source IP for logging, an attacker can inject HTML/JS into this field. This Self-XSS can be exploited by a Login CSRF to force the victim into the attacker's account, and then read emails in a previous browser tab. Version 2026-03b fixes the vulnerability.",
    "published": "2026-04-21T19:19:55.768Z",
    "modified": "2026-04-21T20:36:24.334Z",
    "type": "cve",
    "title": "mailcow: dockerized vulnerable to stored XSS in user login history real_rip",
    "source": "GitHub_M",
    "references": "https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-jprq-w83q-q62h",
    "id": "CVE-2026-40875",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79",
        "CWE-80"
    ],
    "cvelist": null,
    "sourceData": "mailcow mailcow-dockerized < 2026-03b",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/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": "",
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            "privilegesRequired": "",
            "userInteraction": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "mailcow-dockerized",
    "version": "< 2026-03b",
    "vendor": "mailcow",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}