ZDI-26-358: Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability
A cross-site scripting (XSS) vulnerability exists in the downloadAttachment functionality of Allegra, allowing remote attackers to execute arbitrary scripts. Exploitation requires user interaction, such as visiting a malicious page or opening a malicious file. The vulnerability has a low severity rating with a CVSS score assigned by ZDI of 4.6. No specific affected versions or patches are currently identified.
AI Analysis
Technical Summary
The Allegra downloadAttachment feature is vulnerable to a cross-site scripting (XSS) attack that can be triggered remotely if a user interacts with malicious content. This vulnerability enables attackers to execute arbitrary scripts within the context of the affected application. The Zero Day Initiative assigned CVE-2026-11443 to this issue and rated it with a CVSS score of 4.6, indicating a low severity level. No information about affected versions or available patches has been provided.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary scripts in the context of the Allegra application, potentially leading to session hijacking or other script-based attacks. However, exploitation requires user interaction, which limits the risk. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when interacting with untrusted content that could trigger this vulnerability.
ZDI-26-358: Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability
Description
A cross-site scripting (XSS) vulnerability exists in the downloadAttachment functionality of Allegra, allowing remote attackers to execute arbitrary scripts. Exploitation requires user interaction, such as visiting a malicious page or opening a malicious file. The vulnerability has a low severity rating with a CVSS score assigned by ZDI of 4.6. No specific affected versions or patches are currently identified.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Allegra downloadAttachment feature is vulnerable to a cross-site scripting (XSS) attack that can be triggered remotely if a user interacts with malicious content. This vulnerability enables attackers to execute arbitrary scripts within the context of the affected application. The Zero Day Initiative assigned CVE-2026-11443 to this issue and rated it with a CVSS score of 4.6, indicating a low severity level. No information about affected versions or available patches has been provided.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary scripts in the context of the Allegra application, potentially leading to session hijacking or other script-based attacks. However, exploitation requires user interaction, which limits the risk. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when interacting with untrusted content that could trigger this vulnerability.
Threat ID: 6a2bf5b8e617e2d83464941d
Added to database: 6/12/2026, 12:04:08 PM
Last enriched: 6/12/2026, 12:04:24 PM
Last updated: 6/12/2026, 1:31:27 PM
Views: 4
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