How severe is CVE-2020-28724?

CVE-2020-28724 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-28724 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28724?

CVE-2020-28724 affects Palletsprojects Werkzeug. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28724?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-28724 published?

CVE-2020-28724 was published on 2020-11-18 and last updated on 2026-06-17.

CVE-2020-28724

CVE-2020-28724 is a medium-severity vulnerability in Palletsprojects Werkzeug with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Palletsprojects Werkzeug
Published: 2020-11-18
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2020-28724?: Open redirect vulnerability in werkzeug before 0.11.6 via a double slash in the URL.
How severe is CVE-2020-28724?: CVE-2020-28724 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-28724 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28724?: CVE-2020-28724 affects Palletsprojects Werkzeug. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28724?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28724 published?: CVE-2020-28724 was published on 2020-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*

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Other CWE-601 (Open Redirect) vulnerabilities

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