CVE-2026-33400
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability10. percentile0.2%
ProductWallos
PublishedMar 24, 2026
First seenMar 24, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- wallosapp wallos4.7.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wallosapp wallos | v < 4.7.0 | 4.7.0 |
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