← Vulnerability feed

Vulnerability record · CVE-2026-33400 · published 24 March 2026

CVE-2026-33400: Wallosapp wallos cross-site scripting vulnerability

Wallosapp · Wallos

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.

5.4 CVSS 3.1 Medium EPSS 0.29% · top 80.8% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef Patch
https://github.com/ellite/Wallos/security/advisories/GHSA-p6v5-227f-f3fv ExploitVendor Advisory

Track CVE-2026-33400 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-55372Wallosapp wallos vulnerabilityWallos <=2.38.2 has a file upload vulnerability in the restore database function, which allows unauthenticated users to restore database by uploading…EPSS 0.64%9.8CVE-2024-55371Wallosapp wallos vulnerabilityWallos <= 2.38.2 has a file upload vulnerability in the restore backup function, which allows authenticated users to restore backups by uploading a Z…EPSS 0.62%8.8CVE-2026-30840Wallosapp wallos improper certificate validation vulnerabilityWallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.6.2, there is a server-side request forgery vulnerability i…EPSS 0.54%8.7CVE-2026-30828Wallosapp wallos path traversal vulnerabilityWallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.6.2, the url parameter can be used to retrieve local system…EPSS 0.51%8.3CVE-2026-33407Wallosapp wallos server-side request forgery (ssrf) vulnerabilityWallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY a…EPSS 0.53%8.1CVE-2024-29320Wallosapp wallos sql injection vulnerabilityWallos before 1.15.3 is vulnerable to SQL Injection via the category and payment parameters to /subscriptions/get.php.EPSS 0.67%7.7CVE-2026-33399Wallosapp wallos server-side request forgery (ssrf) vulnerabilityWallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the SSRF fix applied in version 4.6.2 for CVE-2026-308…EPSS 0.40%7.7CVE-2026-27479Wallosapp wallos server-side request forgery (ssrf) vulnerabilityWallos is an open-source, self-hostable personal subscription tracker. Versions 4.6.0 and below contain a Server-Side Request Forgery (SSRF) vulnerab…EPSS 0.43%

Source: NIST National Vulnerability Database (record CVE-2026-33400), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.