CVE-2021-32797

HIGHNVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.4 under NVD CVSS v3. EPSS exploit probability: 0.9%, top 25% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 7.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

JupyterLab is a user interface for Project Jupyter which will eventually replace the classic Jupyter Notebook. In affected versions untrusted notebook can execute code on load. In particular JupyterLab doesn’t sanitize the action attribute of html ``. Using this it is possible to trigger the form validation outside of the form itself. This is a remote code execution, but requires user action to open a notebook.

CVSS v3
7.4
EG Score
7.4(medium)
EPSS
84.0%
KEV
Not listed

Published

August 9, 2021

Last Modified

November 21, 2024

References (4)

Affected Packages

(2 across 1 ecosystem)
PyPI(2)
PackageVulnerable rangeFixed inDependents
jupyterlab0.0.1 ... 3.1.2 (294 versions)3.1.4—
notebook6.0.0 ... 6.4.0rc0 (18 versions)6.4.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
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  8. 2026-07-19 02:27 UTCEPSS rescore
  9. 2026-07-18 14:59 UTCOSV refresh
  10. 2026-07-18 10:02 UTCEPSS rescore
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  12. 2026-07-16 17:00 UTCEPSS rescore
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  1. 2026-07-06 02:21 UTCEPSS rescore
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  7. 2026-06-30 23:20 UTCEPSS rescore
  8. 2026-06-30 23:20 UTCEPSS rescore
  9. 2026-06-30 20:00 UTCOSV refresh
  10. 2026-06-29 14:04 UTCEPSS rescore
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  21. 2026-06-21 14:55 UTCEPSS rescore
  22. 2026-06-21 01:58 UTCEPSS rescore
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  24. 2026-06-19 19:24 UTCEPSS rescore
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  26. 2026-06-18 17:51 UTCEPSS rescore
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  31. 2026-06-15 17:46 UTCEPSS rescore
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  33. 2026-06-13 22:58 UTCEPSS rescore
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  35. 2026-06-13 00:44 UTCOSV refresh
  36. 2026-06-12 23:10 UTCEPSS rescore
  37. 2026-06-12 23:10 UTCEPSS rescore
  38. 2026-06-11 13:58 UTCEPSS rescore
  39. 2026-06-10 22:16 UTCEPSS rescore
  40. 2026-06-10 13:20 UTCEPSS rescore
  41. 2026-06-08 14:15 UTCEPSS rescore
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  43. 2026-06-07 15:23 UTCEPSS rescore
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  45. 2026-06-06 13:46 UTCEPSS rescore
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  48. 2026-06-05 22:45 UTCEPSS rescore
  49. 2026-06-05 06:09 UTCEPSS rescore
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  57. 2026-05-31 22:29 UTCEPSS rescore
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  59. 2026-05-31 00:15 UTCEPSS rescore
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  61. 2026-05-29 13:42 UTCEPSS rescore
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  68. 2026-05-26 13:42 UTCEPSS rescore
  69. 2026-05-26 12:24 UTCEG score recompute
  70. 2026-05-26 07:17 UTCEPSS rescore
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  72. 2026-05-26 07:17 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-32797?
CVE-2021-32797 is a high vulnerability published on August 9, 2021. JupyterLab is a user interface for Project Jupyter which will eventually replace the classic Jupyter Notebook. In affected versions untrusted notebook can execute code on load. In particular JupyterLab doesn’t sanitize the action attribute of html <form>. Using this it is possible to trigger the…
When was CVE-2021-32797 disclosed?
CVE-2021-32797 was first published in the National Vulnerability Database on August 9, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-32797 actively exploited?
CVE-2021-32797 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-32797?
CVE-2021-32797 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2021-32797?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-32797, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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