CVE-2026-54395 (GCVE-0-2026-54395)

Vulnerability from cvelistv5 – Published: 2026-06-12 20:36 – Updated: 2026-06-15 17:56
VLAI
Title
MISP UiBeta event index reflected XSS in advanced filter popup
Summary
MISP contains a reflected cross-site scripting vulnerability in the UiBeta event index view. The urlparams value is inserted into an inline JavaScript handler using HTML escaping inside a single-quoted JavaScript string. Because browsers HTML-decode attribute values before JavaScript parsing, a crafted searcheventinfo value can restore encoded quote characters and break out of the JavaScript string. An attacker could craft a malicious URL that, when opened by a victim using the UiBeta event index, executes arbitrary JavaScript in the victim’s browser in the context of the MISP instance. The issue is fixed by encoding the value as a JavaScript string literal with json_encode() before applying HTML escaping at the attribute layer.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 17:56 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
CIRCL CNA under the ENISA root
CNA scorecard A 90/100 over 247 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
misp misp Affected: 0 , < 2.5.40 (semver)
guessed Create a notification for this product.
Credits
🕵️‍♂️ Jeroen Pinoy 🐞 Andras Iklody (the Insomniac MISP lead dev)
Show details on NVD website
To clipboard 

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