What’s Vulnerable › Vulnerabilities

CVE-2019-12490

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-22 · updated 2026-06-17

Description

An issue was discovered in Simple Machines Forum (SMF) before 2.0.16. Reverse tabnabbing can occur because of use of _blank for external links.

Affected products

• SimpleMachines Simple Machines Forum: before 2.0.16 — fixed in 2.0.16

How to fix

Upgrade to a fixed version: SimpleMachines Simple Machines Forum 2.0.16. Check the vendor advisory for mitigations.

References

• https://www.simplemachines.org/community/index.php?topic=570986.0
• https://www.youtube.com/watch?v=gCVeFoxZ1DI
• https://www.simplemachines.org/community/index.php?topic=570986.0
• https://www.youtube.com/watch?v=gCVeFoxZ1DI

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