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CVE-2026-103662

MISP Reflected XSS in Taxonomy Tag Confirmation Forms

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 2.5.48
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • MISP MISP

    fixed in 2.5.48

References 1

GitHub · MISP/MISP