What’s Vulnerable › Vulnerabilities

CVE-2018-19202

• 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: 2019-04-11 · updated 2026-06-17
• Weakness: CWE-79

Description

A reflected XSS vulnerability in index.php in MyBB 1.8.x through 1.8.19 allows remote attackers to inject JavaScript via the 'upsetting[bburl]' parameter.

Affected products

• mybb: from 1.8.0 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/
• https://mybb.com/versions/1.8.20/
• https://blog.mybb.com/
• https://mybb.com/versions/1.8.20/

Get alerted when CVE-2018-19202 or the next vulnerability affects your stack