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CVE-2026-11443— Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability

Quick assessment

Affected
Allegra Allegra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Allegra是Allegra公司的一款适用于中型企业的项目管理软件。 Allegra 8.1.6.22版本存在跨站脚本漏洞，该漏洞源于downloadAttachment方法对用户提供的数据缺乏适当验证，可能导致注入任意脚本，攻击者可利用此漏洞在当前用户环境中执行脚本。

AI Predicted 6.1 Difficulty: Moderate EPSS 0.82% · P56

Affected Version Matrix 1

VendorProduct Version RangeStatus
Allegra Allegra 8.1.6.22 affected
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I. Basic Information for CVE-2026-11443

Vulnerability Information
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Vulnerability Title
Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Allegra 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Allegra是Allegra公司的一款适用于中型企业的项目管理软件。 Allegra 8.1.6.22版本存在跨站脚本漏洞，该漏洞源于downloadAttachment方法对用户提供的数据缺乏适当验证，可能导致注入任意脚本，攻击者可利用此漏洞在当前用户环境中执行脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Allegra Allegra 8.1.6.22 -

II. Public POCs for CVE-2026-11443

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III. Intelligence Information for CVE-2026-11443

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Vendor Advisories for CVE-2026-11443 (1)

Vendor Pages for CVE-2026-11443 (1)

IV. Related Vulnerabilities

Same product: Allegra
Same vendor: Allegra
Same weakness: CWE-79

V. Comments for CVE-2026-11443

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