Medium 5.4Published Mar 24, 2026

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

Updated under an hour ago (Oct 26, 2026, 11:25 PM ET)

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It affects ellite Wallos and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for ellite Wallos

Exploited in the last 30 days

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: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ellite Wallos ellite:wallos (from the name)	before 4.7.0	CNA record
wallosapp wallos wallosapp:wallos	before 4.7.0	NVD

References

References

https://github.com/ellite/Wallos/security/advisories/GHSA-p6v5-227f-f3fv	x-refsource-confirm, exploit, vendor-advisory
https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.