Wallos: SSRF via Unvalidated User-Level SMTP Host in Email Notification Settings

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77351
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-31 22:17:20 UTC
Updated2026-08-31 22:17:20 UTC
DescriptionWallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host — including private and cloud-metadata IP addresses — in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server's perspective. This issue has been patched in version 5.0.0.

Risk And Classification

Primary CVSS: v3.1 3.5 LOW from [email protected]

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

Problem Types: CWE-918 | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.5LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
3.1CNADECLARED3.5LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ellite Wallos affected < 5.0.0 Not specified

References

ReferenceSourceLinkTags
github.com/ellite/Wallos/security/advisories/GHSA-mwqv-gv8x-9jcp [email protected] github.com
github.com/ellite/Wallos/releases/tag/v5.0.0 [email protected] github.com
github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3 [email protected] github.com
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