CVE-2021-47905

MyBB Delete Account Plugin 1.4 - Cross-Site Scripting

MyBB Delete Account Plugin 1.4 contains a cross-site scripting vulnerability in the account deletion reason input field. Attackers can inject malicious scripts that will execute in the admin interface when viewing delete account reasons.

Affected

vintagedaddyo · MyBB Delete Account Plugin

CVSS v4.0 VULNCHECK

5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.25% chance of exploitation in the next 30 days, 15th percentile

Published

2026-01-23

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/49500

Security advisories

• https://www.vulncheck.com/advisories/mybb-delete-account-plugin-cross-site-scripting
• vintagedaddyo/MyBB_Plugin-Delete_Account

References

• CVE Record
• NVD entry