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CVE-2023-28467

MediumPublished

In MyBB before 1.8.34, there is XSS in the User CP module via the user email field.

Published: May 22, 2023
Updated: Jan 21, 2025
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 42.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

In MyBB before 1.8.34, there is XSS in the User CP module via the user email field.

Sources

CVE-2023-28467PoC
Proof-of-concept for a persistent XSS vulnerability in MyBB 1.8.33 User CP, allowing authenticated users to inject HTML via the email field, with remediation guidance.

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