Cross-Site Scripting in MyBB Delete Account Plugin by MyBB
CVE-2021-47905

5.1MEDIUM

Key Information:

Vendor

Vintagedaddyo

Status
Mybb Delete Account Plugin
Vendor
CVE Published:
23 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47905?

The MyBB Delete Account Plugin version 1.4 is susceptible to a cross-site scripting (XSS) vulnerability. This flaw arises from improper validation of the input field used for account deletion reasons, enabling attackers to inject malicious scripts. These scripts can be executed within the admin interface, posing a significant risk to the security and integrity of the application. Administrators viewing the deletion reasons may inadvertently trigger the execution of the injected scripts, leading to potential exploitations.

Affected Version(s)

MyBB Delete Account Plugin 1.4

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-2021-47905 - Proof of Concept

References

https://www.exploit-db.com/exploits/49500
exploit
https://github.com/vintagedaddyo/MyBB_Plugin-Delete_Account/
product
https://www.vulncheck.com/advisories/mybb-delete-account-...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

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