6.2

CVE-2026-103388

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

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerMISP
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Produkt MISP
Version 0
Version < 2.5.48
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.141
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
5a6e4751-2f3f-4070-9419-94fb35b644e8 6.2 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://github.com/MISP/MISP/commit/118528767