What’s Vulnerable › Vulnerabilities

CVE-2018-19201

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-03-29 · updated 2026-06-17
• Weakness: CWE-79

Description

A reflected XSS vulnerability in the ModCP Profile Editor in MyBB before 1.8.20 allows remote attackers to inject JavaScript via the 'username' parameter.

Affected products

• mybb: before 1.8.20 — fixed in 1.8.20

How to fix

Upgrade to a fixed version: mybb 1.8.20. Check the vendor advisory for mitigations.

References

• https://blog.mybb.com/2019/02/27/mybb-1-8-20-released-security-maintenance-release/
• https://github.com/mybb/mybb/blob/feature/SECURITY.md#technical-details-of-known-issues
• https://blog.mybb.com/2019/02/27/mybb-1-8-20-released-security-maintenance-release/
• https://github.com/mybb/mybb/blob/feature/SECURITY.md#technical-details-of-known-issues

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