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CVE-2023-38506— Cross-site Scripting (XSS) when pasting HTML into the rich text editor in Joplin

Quick assessment

Affected
laurent22 joplin
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Joplin是一款开源的笔记和待办事项应用程序。 Joplin 2.12.10之前版本存在安全漏洞，该漏洞源于存在跨站脚本(XSS)漏洞，允许将不受信任的数据粘贴到文本编辑器中以执行任意代码。

CVSS 8.2 · High EPSS 0.42% · P35
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I. Basic Information for CVE-2023-38506

Vulnerability Information
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Vulnerability Title
Cross-site Scripting (XSS) when pasting HTML into the rich text editor in Joplin
Source: CVE Program / CVE List V5
Vulnerability Description
Joplin is a free, open source note taking and to-do application. A Cross-site Scripting (XSS) vulnerability allows pasting untrusted data into the rich text editor to execute arbitrary code. HTML pasted into the rich text editor is not sanitized (or not sanitized properly). As such, the `onload` attribute of pasted images can execute arbitrary code. Because the TinyMCE editor frame does not use the `sandbox` attribute, such scripts can access NodeJS's `require` through the `top` variable. From this, an attacker can run arbitrary commands. This issue has been addressed in version 2.12.10 and users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
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
Joplin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Joplin是一款开源的笔记和待办事项应用程序。 Joplin 2.12.10之前版本存在安全漏洞，该漏洞源于存在跨站脚本(XSS)漏洞，允许将不受信任的数据粘贴到文本编辑器中以执行任意代码。
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
laurent22 joplin < 2.12.10 -

II. Public POCs for CVE-2023-38506

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 10541 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2023-38506

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Vendor Advisories for CVE-2023-38506 (1)

Same Patch Batch · laurent22 · 2024-06-21 · 4 CVEs total

CVE-2023-45673 8.9 HIGH Arbitrary code execution on click of PDF links in Joplin
CVE-2023-39517 8.2 HIGH Cross site scripting (XSS) when clicking on an untrusted `<map>` link in Joplin
CVE-2023-37898 8.2 HIGH Safe mode Cross-site Scripting (XSS) vulnerability in Joplin

IV. Related Vulnerabilities

Same product: joplin
Same vendor: laurent22
Same weakness: CWE-79

V. Comments for CVE-2023-38506

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