CVE-2026-33400 MEDIUM

CVE-2026-33400: Wallos: Stored cross-site scripting (XSS) vulnerability in the payment method rename endpoint

Vendor Ellite
Product Wallos
Weakness CWE-79 · XSS
Published March 24, 2026
Last update March 24, 2026
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 24, 2026 CVE published
March 24, 2026 Record updated