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CVE-2026-44742

Quick assessment

Affected
Postorius project Postorius
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.

Postorius是GNU Mailman开源的一个管理邮件列表的Web应用。应用软件 Postorius 1.3.13及之前版本存在跨站脚本漏洞，该漏洞源于在Held messages弹出窗口中渲染时未转义消息主题中的HTML。

CVSS 7.2 · High EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
Postorius project Postorius ≤ 1.3.13 affected
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I. Basic Information for CVE-2026-44742

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
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
Postorius 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Postorius是GNU Mailman开源的一个管理邮件列表的Web应用。应用软件 Postorius 1.3.13及之前版本存在跨站脚本漏洞，该漏洞源于在Held messages弹出窗口中渲染时未转义消息主题中的HTML。
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
Postorius project Postorius 0 ~ 1.3.13 -

II. Public POCs for CVE-2026-44742

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III. Intelligence Information for CVE-2026-44742

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Patches & Fixes for CVE-2026-44742 (2)

Mailing List Discussions for CVE-2026-44742 (1)

Other References for CVE-2026-44742 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-44742

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