What’s Vulnerable › Vulnerabilities

CVE-2020-28724

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-18 · updated 2026-06-17
• Weakness: CWE-601

Description

Open redirect vulnerability in werkzeug before 0.11.6 via a double slash in the URL.

Affected products

• pallets werkzeug: before 0.11.6 — fixed in 0.11.6

How to fix

Upgrade to a fixed version: pallets werkzeug 0.11.6. Check the vendor advisory for mitigations.

References

• https://github.com/pallets/flask/issues/1639
• https://github.com/pallets/werkzeug/issues/822
• https://github.com/pallets/werkzeug/pull/890/files
• https://github.com/pallets/flask/issues/1639
• https://github.com/pallets/werkzeug/issues/822
• https://github.com/pallets/werkzeug/pull/890/files

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