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CVE-2026-33400

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

Published: Mar 24, 2026Updated: Mar 26, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.2%
Top 91.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Wallosellite
On-prem
Networking Infrastructure / network-management
walloswallosapp
On-prem
Web & CMS Plugins / site-builder
elliteNetworking Infrastructureaka wallos
wallosapposs-projectWeb & CMS Pluginsaka wallos

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

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

Timeline

Published
Mar 24, 2026
Last Updated
Mar 26, 2026

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