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CVE-2021-27760— HCL Notes 11.0 - 11.0.1 FP4 Sametime Embedded chat clients are vulnerable to group chats loading script on restart

Quick assessment

Affected
HCL Software HCL Notes
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.

HCL Technologies Notes是印度HCL Technologies公司的一款电子邮件软件。该软件支持访问电子邮件、日历和联系人等。 HCL Technologies Notes 11.0 - 11.0.1 FP4 客户端存在安全漏洞，该漏洞源于在重新启动时容易受到群聊加载脚本的攻击，会导致在另一个聊天客户端上执行远程代码。

CVSS 4.6 · Medium EPSS 0.68% · P50
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I. Basic Information for CVE-2021-27760

Vulnerability Information
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Vulnerability Title
HCL Notes 11.0 - 11.0.1 FP4 Sametime Embedded chat clients are vulnerable to group chats loading script on restart
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in the Sametime chat feature in the Notes 11.0 - 11.0.1 FP4 clients. An authenticated Sametime chat user could cause Remote Code Execution on another chat client by sending a specially formatted message through chat containing Javascript code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
HCL Technologies Notes 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HCL Technologies Notes是印度HCL Technologies公司的一款电子邮件软件。该软件支持访问电子邮件、日历和联系人等。 HCL Technologies Notes 11.0 - 11.0.1 FP4 客户端存在安全漏洞，该漏洞源于在重新启动时容易受到群聊加载脚本的攻击，会导致在另一个聊天客户端上执行远程代码。
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
HCL Software HCL Notes 11.0 - 11.0.1 FP4 -

II. Public POCs for CVE-2021-27760

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III. Intelligence Information for CVE-2021-27760

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Other References for CVE-2021-27760 (1)

Same Patch Batch · HCL Software · 2022-05-06 · 10 CVEs total

CVE-2021-27764 7.4 HIGH HCL BigFix WebUI Cookie missing attributes
CVE-2021-27765 6.7 MEDIUM HCL BigFix Platform Server API is affected by Privilege Escalation Vulnerability
CVE-2021-27766 6.7 MEDIUM HCL BigFix Platform Client is affected by a Privilege Escalation Vulnerability
CVE-2021-27767 6.7 MEDIUM HCL BigFix Platform Console is affected by a Privilege Escalation Vulnerability
CVE-2021-27761 4.8 MEDIUM HCL BigFix Platform is affected by weak web transport security
CVE-2021-27762 4.7 MEDIUM HCL BigFix Platform is affected by misconfigured security-related HTTP headers
CVE-2021-27751 4.4 MEDIUM HCL Commerce is affected by an Insufficient Session Expiration vulnerability.
CVE-2021-27758 4.3 MEDIUM HCL BigFix Platform 跨站请求伪造漏洞
CVE-2021-27759 2.3 LOW HCL Technologies BigFix Platform 数据伪造问题漏洞

IV. Related Vulnerabilities

Same product: HCL Notes
Same vendor: HCL Software
Same weakness: CWE-20

V. Comments for CVE-2021-27760

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