How severe is CVE-2021-32609?

CVE-2021-32609 has a CVSS score of 5.4/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-32609?

CVE-2021-32609 affects the following packages: apache-superset (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2021-32609?

Update apache-superset to 1.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-32609 is resolved across your whole dependency graph.

How do I detect CVE-2021-32609 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for apache-superset, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-32609 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2021-32609 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-32609 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-32609?

CVE-2021-32609 has an EPSS (Exploit Prediction Scoring System) score of 1.7%, placing it in the 77th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-32609?

CVE-2021-32609 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-32609 published, and has it been updated?

CVE-2021-32609 was published on October 18, 2021 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

MEDIUM severity

CVE-2021-32609 — apache-superset

MEDIUM

CVE-2021-32609 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in apache-superset. A fix is available for apache-superset — see the affected versions and patch details below.

Apache Superset Cross-site Scripting (XSS) vulnerability on the Explore page

Also known asBIT-superset-2021-32609GHSA-f8vc-f28w-x9c9PYSEC-2021-377

Published

Oct 18, 2021

Updated

Oct 24, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs77th percentile — riskier than 77% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐍apache-superset

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Apache Superset up to and including 1.1 does not sanitize titles correctly on the Explore page. This allows an attacker with Explore access to save a chart with a malicious title, injecting html (including scripts) into the page.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`apache-superset`	all versions	1.2.0`pip install --upgrade 'apache-superset==1.2.0'`

Affected Products

1 product · 1 configurations

Application

supersetapache

≤ 1.1

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for apache-superset, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update apache-superset to 1.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-32609 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-32609 in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.4/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Oct 18, 2021

Last updated

Oct 24, 2026

Identifiers

CVE-2021-32609

GHSA-f8vc-f28w-x9c9

BIT-superset-2021-32609

PYSEC-2021-377

References

Advisorylists.apache.org · r2c09254e98b4f8b3deb422762bd0e2aa6d743b72d96c2f90cbaae31a@<dev.superset.apache.org>Advisorynvd.nist.gov · CVE 2021 32609 Advisorygithub.com · GHSA f8vc f28w x9c9 Webgithub.com · superset Webgithub.com · PYSEC 2021 377.yaml

Related vulnerabilities

This CVE is medium severity; 7 of 8 other CVEs affecting apache-superset are rated as high or higher (top: high).

CVE-2026-23982CVE-2026-23969CVE-2026-23980CVE-2026-23983CVE-2026-23984CVE-2025-55673CVE-2025-55672CVE-2025-55674

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026