CVE-2021-47973— Sticky Notes Widget 3.0.6 Denial of Service via Buffer Overflow
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| sticky-notes | Sticky Notes Widget | 3.0.6 | affected |
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I. Basic Information for CVE-2021-47973
Vulnerability Information
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Vulnerability Title
Sticky Notes Widget 3.0.6 Denial of Service via Buffer Overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sticky Notes Widget 3.0.6 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash on iOS devices.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的内存分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Sticky Notes Widget 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Sticky Notes Widget 3.0.6版本存在安全漏洞，该漏洞源于允许攻击者通过粘贴超长字符串到笔记字段导致拒绝服务，攻击者可生成包含350000个重复字符的有效载荷并两次粘贴到新笔记中触发iOS设备上的
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 |
|---|---|---|---|---|
| sticky-notes | Sticky Notes Widget | 3.0.6 | - |
II. Public POCs for CVE-2021-47973
| # | POC Description | Source Link | Shenlong Link |
|---|
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Exploit · 1News · 1
IV. Related Vulnerabilities
Same weakness: CWE-789
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Uncontrolled Memory Allocation vulnerability in Progress Sof - CVE-2026-47313
SAMSUNG Escargot 安全漏洞 - CVE-2026-6340
Memory Exhaustion via Malicious 7zip File Upload - CVE-2021-47972
Sticky Notes & Color Widgets 1.4.2 Denial of Service
V. Comments for CVE-2021-47973
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