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CVE-2026-74999

Quick assessment

Affected
Roundcube Webmail
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.

Roundcube Webmail是Roundcube团队开源的一款Web邮件客户端软件。 Roundcube Webmail 1.6.18之前版本和1.7.3版本之前的1.7.x版本存在跨站脚本漏洞，该漏洞源于“添加到通讯录”操作存在存储型跨站脚本漏洞。

CVSS 5.4 · Medium EPSS 0.21% · P12

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
Roundcube Webmail 1.6.0< 1.6.18 affected
1.7.0< 1.7.3 affected
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I. Basic Information for CVE-2026-74999

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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
Roundcube Webmail 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Roundcube Webmail是Roundcube团队开源的一款Web邮件客户端软件。 Roundcube Webmail 1.6.18之前版本和1.7.3版本之前的1.7.x版本存在跨站脚本漏洞，该漏洞源于“添加到通讯录”操作存在存储型跨站脚本漏洞。
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
Roundcube Webmail 1.6.0 ~ 1.6.18 -

II. Public POCs for CVE-2026-74999

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III. Intelligence Information for CVE-2026-74999

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Patches & Fixes for CVE-2026-74999 (3)

Vendor Advisories for CVE-2026-74999 (1)

Vendor Pages for CVE-2026-74999 (1)

Same Patch Batch · Roundcube · 2026-08-17 · 10 CVEs total

CVE-2026-74997 8.8 HIGH Roundcube Webmail 命令注入漏洞
CVE-2026-74998 7.2 HIGH Roundcube Webmail 跨站脚本漏洞
CVE-2026-75002 7.1 HIGH Roundcube Webmail 命令注入漏洞
CVE-2026-75010 6.4 MEDIUM Roundcube Webmail 权限许可和访问控制问题漏洞
CVE-2026-75000 5.8 MEDIUM Roundcube Webmail 权限许可和访问控制问题漏洞
CVE-2026-75003 5.8 MEDIUM Roundcube Webmail 权限许可和访问控制问题漏洞
CVE-2026-75006 5.8 MEDIUM Roundcube Webmail 服务端请求伪造漏洞
CVE-2026-75007 5.4 MEDIUM Roundcube Webmail 命令注入漏洞
CVE-2026-75004 4.3 MEDIUM Roundcube Webmail 命令注入漏洞

IV. Related Vulnerabilities

Same product: Webmail
Same vendor: Roundcube
Same weakness: CWE-79

V. Comments for CVE-2026-74999

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