CVE-2026-53693 (GCVE-0-2026-53693)
Vulnerability from cvelistv5 – Published: 2026-06-10 14:34 – Updated: 2026-06-10 16:15
VLAI
EPSS
VEX
Title
MISP BSimVis stored cross-site scripting in tag and cluster rendering paths via unescaped tag metadata and UI labels
Summary
A stored cross-site scripting vulnerability existed in MISP BSimVis tag rendering code. Several client-side rendering paths interpolated tag names, collection names, entity identifiers, cluster names, and tag metadata directly into HTML, HTML attributes, inline JavaScript event handlers, and CSS style values without context-appropriate escaping. The patch adds shared escaping helpers for HTML, attributes, JavaScript strings, and CSS color validation, then applies them across tag badges, tooltips, context menus, cluster cards, autocomplete suggestions, and dynamically inserted tag cards.
An attacker able to create or influence stored tag or metadata values could inject a crafted payload that is later rendered in another user’s browser. Successful exploitation could execute arbitrary JavaScript in the victim’s session when they view affected BSimVis pages, potentially allowing the attacker to perform actions as the victim, read data available to the victim, or alter displayed application content.
This issue affects MISP bsimvis: through v0.2.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 16:15 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/bsimvis/commit/7bcd2c2e27… | patch |
Impacted products
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.