Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability_CVE-2026-11443

4.6 / 10

MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Description

Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to execute arbitrary script on affected installations of Allegra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236.

Basic Information

ID CVE-2026-11443

Source zdi

Published Jun 12, 2026 at 23:04

Affected Product

Vendor Allegra

Product Allegra

Version 8.1.6.22

Affected Versions Allegra Allegra 8.1.6.22

CWE Classification

CWE-79

References

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    "published": "2026-06-12T23:04:45.344Z",
    "modified": "2026-06-12T23:04:45.344Z",
    "type": "cve",
    "title": "Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability",
    "source": "zdi",
    "references": "https://www.zerodayinitiative.com/advisories/ZDI-26-358/\nhttps://alltena.com/en/resources/release-notes/release-notes-for-release-9-0-0/",
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