EUVD-2026-75451
GHSA-6h22-87v4-49wc
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/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
Network-accessible web app (AV:N), low-privilege write account required (PR:L), passive PDF export by another user required (UI:R), impact limited to document integrity (I:L), no confidentiality or availability impact.
Primary rating from Vendor (CIRCL).
CVSS VectorVendor: CIRCL
Lifecycle Timeline
3DescriptionCVE.org
MISP contains an HTML injection vulnerability in the MISPElementHTMLFormatterTool component, which is responsible for rendering MISP element references (attributes, objects, and tags) into inline HTML during PDF report export via the convert_markdown_to_pdf module. The attribute(), objectAttribute(), object(), and tag() methods interpolated user-controlled fields (attribute type, attribute value, object name, object relation, tag name, tag colour, and tag text colour) directly into HTML templates without applying HTML entity encoding. An authenticated user with the ability to create or modify MISP attributes, objects, or tags could embed arbitrary HTML markup in these fields. When a report containing such elements was exported to PDF, the unescaped content was rendered as live HTML rather than inert text, potentially injecting script tags, breaking the document structure, or altering the visual content of the exported report. Additionally, the attribute() method contained a template with hardcoded sample values ("domain-ip" and "google.com") instead of format placeholders, meaning every plain attribute reference in a PDF displayed the sample text rather than the actual indicator value, constituting a data-integrity defect in the exported document. The vulnerability requires an authenticated actor with write access to MISP elements and a subsequent PDF export of a report referencing those elements. The security impact is primarily to the integrity of the exported document and, depending on the HTML-to-PDF rendering engine, potential execution of injected markup during the conversion step.
Version affected: ≤2.5.45
AnalysisAI
HTML injection in MISP versions ≤2.5.45 allows any authenticated user with write access to embed arbitrary HTML markup in attribute types/values, object names/relations, or tag colour and name fields, which renders as live HTML when a report referencing those elements is exported to PDF via the convert_markdown_to_pdf module. The same component shipped a hardcoded sample-value defect - literal strings 'domain-ip' and 'google.com' used as format arguments rather than placeholders - meaning every plain attribute reference in a PDF displayed sample text instead of the real indicator, constituting a separate data-integrity failure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two sequential conditions must be met: first, the attacker must hold a MISP account with write access to at least one element type - attributes, objects, or tags - a non-anonymous role enforced by MISP's role-based access control. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.1 (Medium) accurately reflects the constrained exploitation path: the attacker must be an authenticated MISP user (PR:L) with element write access, and a separate PDF export event must occur (UI:P - passive interaction). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade MISP to version 2.5.46 or later, which applies the fix in commit 949744a4b. … Detailed patch versions, workarounds, and compensating controls in full report. |
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An issue was discovered in MISP 2.4.9x before 2.4.99. Rated high severity (CVSS 8.8), this vulnerability is remotely exp
An issue was discovered in MISP before 2.4.158. Rated critical severity (CVSS 9.8), this vulnerability is remotely explo
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In MISP before 2.4.148, app/Lib/Export/OpendataExport.php mishandles parameter data that is used in a shell_exec call. R
An issue was discovered in app/Controller/UsersController.php in MISP 2.4.92. Rated critical severity (CVSS 9.8), this v
An issue was discovered in MISP 2.4.128. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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