TI-2026-65679 Aliases CVE-2026-103388 GHSA-ccjm-jpcq-p5hf

MISP Stored Cross-Site Scripting via JavaScript URL in Galaxy Cluster Source Field

LOW 27CWE-79Published 2026-09-30 · Updated 2026-09-30

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

MISP renders the source field of a Galaxy Cluster as a clickable hyperlink whenever the stored value passes PHP's FILTER_VALIDATE_URL validation. Because FILTER_VALIDATE_URL accepts the javascript: URI scheme, a user with galaxy editor privileges on the local instance or on a synced instance could store a javascript: URL as the cluster source. When another user views the affected Galaxy Cluster and clicks the rendered link, the embedded script executes in the victim's browser context, enabling session hijacking, data exfiltration, or actions performed on behalf of the victim. Preconditions: - Attacker must hold galaxy editor privileges (local or via sync). - Victim must view the affected cluster and click the malicious link. Impact: - Stored cross-site scripting (XSS) in the victim's browser. - Potential session theft, credential harvesting, or unauthorized actions within the MISP application. Affected: <2.5.48.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00243 15th percentileScored 2026-11-07

Fix Fixed MISP (MISP): 2.5.48

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
MISP	MISP	before 2.5.48	2.5.48	Patch available	CNA

MISP VendorMISP Affected before 2.5.48 Fixed in 2.5.48 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:misp:misp::::::::	—	—	MISP

cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:* Versions — — ·MISP

Remediation

Fix · CNA MISP (MISP) Fixed in 2.5.48

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-30
MISP 2.5.48
6 records Highest priority Priority LOW 6 LOW
Other records, highest priority first
- TI-2026-65615 MISP Tag Collection Save Allows Privilege Escalation via Sibling Model InjectionPriority LOW 39
- TI-2026-65613 MISP Event Delegation Mass Assignment Allows Retargeting Delegation to Arbitrary EventsPriority LOW 39
- TI-2026-65668 MISP Stored Cross-Site Scripting (XSS) via Unvalidated Event Graph Preview ImagePriority LOW 36
Show all 6 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-103388
2026-10-03 Alias added: GHSA-ccjm-jpcq-p5hf

References

Patch 1

Security patch

TI-2025-41517 In MISP before 2.5.28, app/View/Elements/Workflows/executionPath.ctp allows XSS in the workflow execution path. CVSS 3.1CRITICAL 9.0
TI-2026-65744 MISP TOTP Code Replay Allows Duplicate Authentication Within Validity Period CVSS 4.0CRITICAL 9.3
TI-2026-54145 Path Traversal in MISP Object Template Resolution During STIX Import and Export in misp-stix library CVSS 4.0HIGH 8.8
TI-2020-10250 MISP MISP-maltego 1.4.4 incorrectly shares a MISP connection across users in a remote-transform use case. CVSS 3.1CRITICAL 9.8
TI-2026-59159 MISP Unauthenticated Mail Endpoints Allow Unbounded Storage Consumption and Request Flooding CVSS 4.0HIGH 8.7
TI-2026-58541 MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials CVSS 4.0CRITICAL 9.5

See all 182 →

Sources

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