What’s Vulnerable › Vulnerabilities

CVE-2020-26138

• Severity: medium (CVSS 5.3 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: 2021-06-08 · updated 2026-06-17
• Weakness: CWE-20

Description

In SilverStripe through 4.6.0-rc1, a FormField with square brackets in the field name skips validation.

Affected products

• Silverstripe: before 4.6.0; 4.6.0-rc1 — fixed in 4.6.0

How to fix

Upgrade to a fixed version: Silverstripe 4.6.0. Check the vendor advisory for mitigations.

References

• https://forum.silverstripe.org/c/releases
• https://www.silverstripe.org/blog/tag/release
• https://www.silverstripe.org/download/security-releases/
• https://www.silverstripe.org/download/security-releases/cve-2020-26138
• https://forum.silverstripe.org/c/releases
• https://www.silverstripe.org/blog/tag/release
• https://www.silverstripe.org/download/security-releases/
• https://www.silverstripe.org/download/security-releases/cve-2020-26138

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