Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wallosapp | Wallos | < 4.7.0 |
Related Weaknesses (CWE)
References
- https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecefPatch
- https://github.com/ellite/Wallos/security/advisories/GHSA-p6v5-227f-f3fvExploitVendor Advisory
FAQ
What is CVE-2026-33400?
CVE-2026-33400 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 authen...
How severe is CVE-2026-33400?
CVE-2026-33400 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33400?
Check the references section above for vendor advisories and patch information. Affected products include: Wallosapp Wallos.