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CVE-2021-32797

31
FAUCET Score

CVE-2021-32797 is a critical remote code execution (RCE) vulnerability affecting JupyterLab, where untrusted notebooks can execute code upon loading due to improper sanitization of HTML form attributes. This vulnerability carries a CVSS score of 9.6 (CRITICAL) and a FAUCET Risk Score of 77/100, indicating a high potential for impact (confidentiality, integrity, and availability) with low attack complexity, though it requires user interaction to open a malicious notebook. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.21CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.2.10CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*
>= 2.3.0, < 2.3.2CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.0.17CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*
>= 3.1.0, < 3.1.4CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.64%
Probability of exploitation in next 30 days
EPSS Percentile
84.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0264 is in the 88th percentile among its peer group of 834 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

pippatch availablevia ghsa
Product: jupyterlabFixed in: 1.2.21
pippatch availablevia ghsa
Product: notebookFixed in: 5.7.11
pippatch availablevia ghsa
Product: notebookFixed in: 6.4.1
pippatch availablevia ghsa
Product: jupyterlabFixed in: 2.2.10
pippatch availablevia ghsa
Product: jupyterlabFixed in: 2.3.2
pippatch availablevia ghsa
Product: jupyterlabFixed in: 3.0.17
pippatch availablevia ghsa
Product: jupyterlabFixed in: 3.1.4

Vendor Advisories (1)

pipGHSA-4952-p58q-6crxmedium

JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>

Aug 23, 2021

References

github.com / jupyterlab/jupyterlab/commit/504825938c0abfa2fb8ff8d529308830a5ae42ed
ExploitThird Party Advisory
github.com / jupyterlab/jupyterlab/security/advisories/GHSA-4952-p58q-6crx
Third Party Advisory