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Vulnerability Database · PyPI · Package report

flask-unchained: vulnerability history, versions and safety

flask-unchained is a package in the PyPI ecosystem. Vulert records 2 vulnerabilities for it across 40 releases, first recorded in Jun 2021. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

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2 vulnerabilities recorded M1 U1
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0 with no fix published

Every vulnerability has a patched version to move to.

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0 in the last 12 months

Nothing new recorded in the last year.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all flask-unchained vulnerabilities

Vulert verdict on flask-unchained 0.9.0 i

Updated on 23 Oct 2026

Action needed: 0.9.0 has 1 known vulnerability, but every one of them has a fix. Upgrade to the version listed below and you are clear.

Package health score 52/100
  • Security Minor issues
  • Maintenance Slowing
  • Popularity Little adoption
  • Community Inactive

What to do: Upgrade to the version that resolves each vulnerability below. Fix it, then keep watch: this version is affected today, and the next one may be too — Vulert alerts you when a new vulnerability lands. Monitor it with Vulert →

  • Current release 0.9.0 — affected i
  • Vulnerabilities on record 2 over 1 year · 0 in the last year i
  • Latest disclosure 15 Jun 2021 i
  • Highest CVSS 5.4 i
  • With no published fix 0 i
  • Stars 77 i
  • OpenSSF scorecard 1/10 i
  • Last release 64 months ago i
  • Licence MIT i

Version list, release dates, licence and dependants published by PyPI, refreshed 23 Oct 2026. Licence information is not legal advice.

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01 Versions

Which versions are affected

Every version Vulert tracks for flask-unchained, newest first, with the vulnerabilities recorded against each one. A version showing none has no vulnerability in the Vulert database — open it for the full picture on that release.

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Version Released Vulert vulnerabilities Licence Fix published Details
0.10.0a2 08 Feb 2024 U1 MIT Yes Details →
0.10.0a1 08 Feb 2024 U1 MIT Yes Details →
0.10.0b0 08 Feb 2024 U1 MIT Yes Details →
0.10.0a0 08 Feb 2024 U1 MIT Yes Details →
0.9.0 07 Jun 2021 U1 MIT Yes Details →
0.8.1 18 Jan 2021 M1 U1 MIT Yes Details →
0.8.0 20 Dec 2020 M1 U1 MIT Yes Details →
0.7.9 20 May 2019 M1 U1 MIT Yes Details →
0.7.8 21 Apr 2019 M1 U1 MIT Yes Details →
0.7.7 11 Apr 2019 M1 U1 MIT Yes Details →
0.7.6 25 Mar 2019 M1 U1 MIT Yes Details →
0.7.5 25 Mar 2019 M1 U1 MIT Yes Details →
0.7.4 17 Mar 2019 M1 U1 MIT Yes Details →
0.7.3 26 Feb 2019 M1 U1 MIT Yes Details →
0.7.2 26 Feb 2019 M1 U1 MIT Yes Details →
0.7.1 04 Feb 2019 M1 U1 MIT Yes Details →
0.7.0 31 Jan 2019 M1 U1 MIT Yes Details →
0.6.6 10 Oct 2018 M1 U1 MIT Yes Details →
0.6.5 10 Oct 2018 M1 U1 MIT Yes Details →
0.6.4 10 Oct 2018 M1 U1 MIT Yes Details →
0.6.3 10 Oct 2018 M1 U1 MIT Yes Details →
0.6.2 09 Oct 2018 M1 U1 MIT Yes Details →
0.6.1 09 Oct 2018 M1 U1 MIT Yes Details →
0.6.0 09 Oct 2018 M1 U1 MIT Yes Details →
0.5.1 25 Jul 2018 M1 U1 MIT Yes Details →
0.5.0 25 Jul 2018 M1 U1 MIT Yes Details →
0.4.2 21 Jul 2018 M1 U1 MIT Yes Details →
0.4.1 21 Jul 2018 M1 U1 MIT Yes Details →
0.4.0 21 Jul 2018 M1 U1 MIT Yes Details →
0.3.2 16 Jul 2018 M1 U1 MIT Yes Details →
0.3.1 16 Jul 2018 M1 U1 MIT Yes Details →
0.3.0 15 Jul 2018 M1 U1 MIT Yes Details →
0.2.2 09 Apr 2018 M1 U1 MIT Yes Details →
0.2.1 08 Apr 2018 M1 U1 MIT Yes Details →
0.2.0 06 Apr 2018 M1 U1 MIT Yes Details →
0.1.6 30 Mar 2018 M1 U1 MIT Yes Details →
0.1.5 03 Jan 2018 M1 U1 MIT Yes Details →
0.1.4 03 Jan 2018 M1 U1 MIT Yes Details →
0.1.3 03 Jan 2018 M1 U1 MIT Yes Details →
0.1.2 27 Dec 2017 M1 U1 MIT Yes Details →

All 40 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2021 2

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 0 of the 2 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for flask-unchained

The 2 most severe of 2 vulnerabilities recorded for this package

Search all 2 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
CVE-2021-23393: Open redirect vulnerability in Flask-Unchained 5.4 medium 0.9.0 15 Jun 2021
CVE-2021-23393: Flask-Unchained URL Validation Bypass N/A unrated 71e36b28166f9ffbe0a991f51127f0984f7e6a40 11 Jun 2021

Vulnerability wrong, a fix missing, or a package we should cover? Report it and we will fix the record. Report Vulnerability Provide Feedback

Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315

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Questions

About flask-unchained

Is flask-unchained safe to use?

Vulert records 2 vulnerabilities for flask-unchained in PyPI: 0 critical, 0 high, 1 medium and 0 low, plus 1 not yet rated. Every one of them has a published fix, so the practical answer is to run a supported release and keep it patched.

What is flask-unchained's Vulert package health score?

Vulert scores flask-unchained 52/100, which reads as usable, but worth attention. The score weighs the vulnerability record (40), maintenance and release cadence (25), adoption from dependents and stars (20) and community signals such as the OpenSSF scorecard and forks (15).

Is the latest version of flask-unchained affected?

Yes. 0.9.0, the version you would install today, has 1 known vulnerability, and every one of them has a published fix. Upgrade to the version listed for each.

Which version of flask-unchained should I use?

0.9.0 is the version Vulert recommends for the affected releases. The version table above lists every release with the vulnerabilities recorded against it, so you can confirm the range you actually run.

How many vulnerabilities does flask-unchained have?

2 vulnerabilities are recorded for flask-unchained in the PyPI ecosystem: 0 critical, 0 high, 1 medium and 0 low, plus 1 not yet rated. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new flask-unchained vulnerabilities disclosed?

0 vulnerabilities were recorded for flask-unchained in the last 12 months, and the oldest entry in this database dates to 11 Jun 2021. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of flask-unchained are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor flask-unchained for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the flask-unchained version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.