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    CVE-2026-33400

    Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, a stored cross-site scripting (XSS) vulnerability in the payment method rename endpoint allows any authenticated user to inject arbitrary JavaScript that executes when any user visits the Settings, Subscriptions, or Statistics pages. Combined with the wallos_login authentication cookie lacking the HttpOnly flag, this enables full session hijacking. This issue has been patched in version 4.7.0.

    Published:Mar 24, 2026
    Last Modified:Mar 27, 2026
    EPS:Mar 24, 2026
    EPSS Score:0.00047
    CVSS Score:5.4

    Affected Products

    Vendor
    Ellite
    Product
    Wallos
    Vendor
    Wallosapp
    Product
    Wallos

    Exploits

    https://github.com/ellite/Wallos/security/advisories/GHSA-p6v5-227f-f3fv

    Related CVEs

    CVE-2026-77353 (CVSS 4.6) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos allows a…
    CVE-2026-77352 (CVSS 4.3) — Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.…
    CVE-2026-77348 (CVSS 8.2) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, the fix for CVE…
    CVE-2026-77351 (CVSS 3.5) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any…
    CVE-2026-61641 (CVSS 8.1) — Wallos is an open-source, self-hostable personal subscription tracker. From version 4.0.0 to before version 4.…
    CVE-2026-61640 (CVSS 8.5) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, Admin-configure…
    CVE-2026-61639 (CVSS 8.5) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, POST /endpoints…
    CVE-2026-61638 (CVSS 8.2) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, POST /endpoints…
    CVE-2026-54600 (CVSS 8.2) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, endpoints/db/im…
    CVE-2026-54599 (CVSS 7.5) — Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, login.php gener…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High