CVE-2026-33400

MEDIUM EPSS 9.2%
Published Mar 24, 20263mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Mar 24, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
9.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
wallosappwallos* <4.7.0

References 2

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

Remediation

  • github.com https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef
    Patch