FOSSBilling version exposed via asset cache buster_CVE-2026-40495

{
    "lastseen": "",
    "description": "FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 leak the exact system version through asset cache buster parameters in HTML output, bypassing the `hide_version_public` security setting. The FOSSBilling version is embedded in the query string of every `<script>` and `<link>` tag generated by the `script_tag` and `stylesheet_tag` Twig filters. This information is visible to all visitors \u2014 including unauthenticated guests \u2014 on every page, regardless of whether the `hide_version_public` setting is enabled.  The `X-FOSSBilling-Version` HTTP header and the `guest.system.version` API endpoint correctly honour the `hide_version_public` setting, but the asset cache buster parameters were overlooked. Knowledge of the exact FOSSBilling version makes it significantly easier for malicious actors to identify known vulnerabilities applicable to a given installation and craft targeted exploits. While not a direct vulnerability on its own, it undermines the intended protection offered by the `hide_version_public` setting and facilitates reconnaissance. Version 0.8.0 contains a patch. There is no practical workaround that removes the version from asset URLs without modifying source code.",
    "published": "2026-06-03T19:38:28.746Z",
    "modified": "2026-06-03T19:38:28.746Z",
    "type": "cve",
    "title": "FOSSBilling version exposed via asset cache buster",
    "source": "GitHub_M",
    "references": "https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-gqcp-g7rm-p5v6\nhttps://github.com/FOSSBilling/FOSSBilling/releases/tag/0.8.0",
    "id": "CVE-2026-40495",
    "bulletinFamily": "",
    "cwe": [
        "CWE-200"
    ],
    "cvelist": null,
    "sourceData": "FOSSBilling FOSSBilling < 0.8.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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": "FOSSBilling",
    "version": "< 0.8.0",
    "vendor": "FOSSBilling",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}