5.1

CVE-2026-103662

MISP Reflected XSS in Taxonomy Tag Confirmation Forms

MISP contains a reflected cross-site scripting (XSS) vulnerability in the legacy taxonomy tag management confirmation forms (add tag and disable tag).

The affected forms echoed a user-supplied tag name value from the request unescaped into the rendered HTML output. An attacker who can induce a site administrator to visit a crafted URL containing a malicious tag name parameter can execute arbitrary JavaScript in the administrator's browser session.

Preconditions:

- The target must be running a MISP instance with the legacy taxonomy tag confirmation views enabled.

- The victim must be an authenticated site administrator.

- The victim must navigate to the attacker-crafted URL (e.g., via a phishing link).

Security impact:

- Execution of arbitrary client-side script in the context of the administrator's browser.

- Potential theft of session tokens, CSRF tokens, or other sensitive data accessible from the page.

- Potential for performing privileged actions on behalf of the administrator within the MISP interface.

Affected versions: <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 0.34% 0.249
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
5a6e4751-2f3f-4070-9419-94fb35b644e8 5.1 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/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/9619083c8