CVE-2026-44259: CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in efwGrp efw4.X
efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the previewServlet serves files with their detected MIME type based on file extension, without any content sanitization or security headers. Files with .html, .htm, or .svg extensions are served as text/html or image/svg+xml respectively, causing any embedded JavaScript to execute in the victim's browser within the application's origin. This vulnerability is fixed in 4.08.010.
AI Analysis
Technical Summary
efw4.X's previewServlet improperly handles files by serving them with MIME types derived from file extensions without content sanitization or security headers. This behavior affects files with .html, .htm, and .svg extensions, enabling embedded JavaScript to execute in the victim's browser within the application's origin. This constitutes an improper neutralization of script-related HTML tags (CWE-80), a basic XSS vulnerability. The issue is resolved in efw4.X version 4.08.010.
Potential Impact
An attacker can cause execution of arbitrary JavaScript in the context of the vulnerable efw4.X web application by tricking users into loading crafted .html, .htm, or .svg files served by the previewServlet. This can lead to limited confidentiality and integrity impacts as indicated by the CVSS vector (Confidentiality: Low, Integrity: Low, Availability: None). No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade efw4.X to version 4.08.010 or later, where this vulnerability is fixed. Since the vendor advisory indicates the issue is resolved in this version, applying the official fix is the recommended remediation. No additional mitigations are specified.
CVE-2026-44259: CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in efwGrp efw4.X
Description
efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the previewServlet serves files with their detected MIME type based on file extension, without any content sanitization or security headers. Files with .html, .htm, or .svg extensions are served as text/html or image/svg+xml respectively, causing any embedded JavaScript to execute in the victim's browser within the application's origin. This vulnerability is fixed in 4.08.010.
CVSS v3.1
Score 4.6medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
efw4.X's previewServlet improperly handles files by serving them with MIME types derived from file extensions without content sanitization or security headers. This behavior affects files with .html, .htm, and .svg extensions, enabling embedded JavaScript to execute in the victim's browser within the application's origin. This constitutes an improper neutralization of script-related HTML tags (CWE-80), a basic XSS vulnerability. The issue is resolved in efw4.X version 4.08.010.
Potential Impact
An attacker can cause execution of arbitrary JavaScript in the context of the vulnerable efw4.X web application by tricking users into loading crafted .html, .htm, or .svg files served by the previewServlet. This can lead to limited confidentiality and integrity impacts as indicated by the CVSS vector (Confidentiality: Low, Integrity: Low, Availability: None). No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade efw4.X to version 4.08.010 or later, where this vulnerability is fixed. Since the vendor advisory indicates the issue is resolved in this version, applying the official fix is the recommended remediation. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-05T16:33:55.844Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0399d6cbff5d86101a891b
Added to database: 05/12/2026, 21:21:26 UTC
Last enriched: 05/12/2026, 21:37:19 UTC
Last updated: 07/03/2026, 20:51:27 UTC
Views: 71
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