CVE-2026-33400 Details
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.
A stored cross-site scripting vulnerability has been identified in Wallos, a personal subscription tracker, prior to version 4.7.0. The issue resides in the payment method rename endpoint, where user-supplied names are not properly validated before being saved. This allows authenticated users to inject JavaScript that executes when others visit certain pages. Additionally, the wallos_login cookie lacks the HttpOnly flag, enabling session hijacking.
Users are advised to update to Wallos version 4.7.0, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef | [email protected] | Patch |
| https://github.com/ellite/Wallos/security/advisories/GHSA-p6v5-227f-f3fv | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wallosapp wallos | < 4.7.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 26, 2026 | Initial Analysis | [email protected] |
| Mar 24, 2026 | New CVE Received | [email protected] |