CVE-2026-44259: CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in efwGrp efw4.X
CVE-2026-44259 is a medium severity vulnerability in efw4. X versions prior to 4. 08. 010. The previewServlet component serves files with MIME types based on file extensions without sanitizing content or applying security headers. This allows files with . html, . htm, or . svg extensions to execute embedded JavaScript in the context of the application origin, leading to a basic cross-site scripting (XSS) issue. The vulnerability is fixed in version 4.
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
CVE-2026-44259 is a medium severity vulnerability in efw4. X versions prior to 4. 08. 010. The previewServlet component serves files with MIME types based on file extensions without sanitizing content or applying security headers. This allows files with . html, . htm, or . svg extensions to execute embedded JavaScript in the context of the application origin, leading to a basic cross-site scripting (XSS) issue. The vulnerability is fixed in version 4.
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: 5/12/2026, 9:21:26 PM
Last enriched: 5/12/2026, 9:37:19 PM
Last updated: 5/12/2026, 10:24:10 PM
Views: 4
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