CVE-2026-79363

Status: DeferredMedium (5.9)—

Cloudron 9.1.7 and 9.2 contain a stored cross-site scripting (XSS) vulnerability in the Branding Footer feature. An authenticated administrator can store crafted HTML containing JavaScript event handlers in the Footer setting. The stored value is rendered without sufficient sanitization on the public login / OpenID interaction page and in the System Event Log, causing attacker-controlled JavaScript to execute in the Cloudron web origin when an affected page is viewed.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
Base score: 5.9

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.18%
Percentile among all scored CVEs: 7
Score date: 10/17/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1189 Drive-by Compromiseinitial access95 %
Primary impactT1059.007 JavaScriptexecution90 %
Secondary impactT1078 Valid Accountsstealth · persistence · privilege escalation · initial access70 %

XSS almacenado (CWE-79) en página pública de login sin sanitización: T1189. Ejecución de JavaScript en navegador (T1059.007) confirmada. Riesgo de robo de credenciales de sesión (T1078) en página de autenticación.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

User Training Restrict Web-Based Content Application Developer Guidance Active Directory Configuration User Account Management Privileged Account Management

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Cloudron — Cloudron^AI

CWEs

CWE-79

References

Raw JSON (NVD)

Show

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  "lastModified": "2026-10-09T21:17:06.170",
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