Denial of Service Vulnerability in Sticky Notes & Color Widgets by WordPress
CVE-2021-47972

8.7HIGH

Key Information:

Vendor

Sticky-notes-color-widgets

Status
Sticky Notes Color Widgets
Vendor
CVE Published:
16 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47972?

The Sticky Notes & Color Widgets plugin version 1.4.2 has a denial of service vulnerability that can be exploited by attackers to crash the application. This is achieved by creating notes with excessively long character strings, where attackers may insert large payloads of repeated characters into note fields. As a result, the application can become unresponsive, disrupting user access and functionality.

Affected Version(s)

Sticky Notes Color Widgets 1.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47972 - Proof of Concept

References

https://www.exploit-db.com/exploits/49957
exploit
https://www.vulncheck.com/advisories/sticky-notes-color-w...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Geovanni Ruiz
.