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

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.

Scores

EPSS (exploitation in 30 days)

0.20% · top 90% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• ellite · Wallos

  • affected < 4.7.0

References (2)

• https://github.com/ellite/Wallos/security/advisories/GHSA-p6v5-227f-f3fv (opens in a new tab)x_refsource_CONFIRM
• https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-33400](https://trackcve.app/badge/CVE-2026-33400.svg)](https://trackcve.app/cve/CVE-2026-33400)

Record last updated 24 Mar 2026, 20:21 UTC.