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TI-2026-70003 Aliases CVE-2026-79363GHSA-39g8-j5g5-gfjq

Stored cross-site scripting in Cloudron Branding Footer feature

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

Cloudron 9.1.7 and 9.2 are affected. Insufficient sanitization of a stored setting (CWE-79) lets attacker-controlled JavaScript in the Footer setting of the Branding Footer feature run in the Cloudron web origin. An authenticated administrator can store the crafted HTML, and it executes when a user views the public login or OpenID interaction page or the System Event Log.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00177 7th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Cloudron.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-79363
  2. 2026-10-09 Alias added: GHSA-39g8-j5g5-gfjq
  3. 2026-10-10 CVSS score added · CISA ADP
  4. 2026-10-10 Weakness changed · CISA ADP
  5. 2026-10-10 CISA SSVC decision points changed
  6. 2026-10-10 Priority changed: LOW → MEDIUM
  7. 2026-11-06 Affected versions changed · Red Hat
  8. 2026-11-06 CVSS score added · Red Hat

References

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences