Exploit discussion active in current signal (1 latest mentions)
Recommended action window: High priority (within 72h)
NVD description
File Viewer is a browser-native viewer for Office, PDF, CAD, archive, and other files in private and internal web applications. Prior to @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2, the legacy DOC renderer emitted document-controlled hyperlink targets into generated HTML after character escaping but without restricting URL schemes. A crafted legacy DOC file could place javascript:, vbscript:, data:, or another unsafe scheme in a rendered link, and script could execute in the embedding application's origin when a user clicked the link. The fix blocks external document links by default, allows only HTTP(S), mail, telephone, safe relative URLs, and internal bookmarks when external links are explicitly enabled, and applies mount-boundary sanitization as defense in depth. This issue is fixed in @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-09-21 | 1 | Disclosure1 |
| 2026-09-26 | 1 | Patch1 |
درع زايد يضع مكتبة DOM XSS في المسار الصحيح" ✅ CVE-2026-91127 الآن ✅ GREEN LIGHT@CVE https://t.co/atI0FlYJ9F
Post summary
The tweet announces CVE-2026-91127 with technical details about a DOM XSS vulnerability and a linked resource, but lacks explicit references to PoC code, exploit tools, or active exploitation. The 'GREEN LIGHT' phrase implies readiness rather than direct evidence of exploitation.
CVE-2026-91127: XSS in File Viewer legacy DOC renderer, CVSS 8.2, no patch yet. Malicious DOC injects javascript: links, executing script in your app. Update to @file-viewer/doc 2.3.1 immediately. https://www.valtersit.com/cve/CVE-2026-91127 #CVE #infosec #FileViewer #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker
Post summary
The tweet discloses a high-severity XSS vulnerability (CVE-2026-91127) in File Viewer and explicitly instructs users to update to version 2.3.1 as the primary remediation action.