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CVE-2021-41134

MEDIUMCVSS 5.4/10EPSS 0.68%

Last modified

CVE-2021-41134 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. nbdime provides tools for diffing and merging of Jupyter Notebooks. In affected versions a stored cross-site scripting (XSS) issue exists within the Jupyter-owned nbdime project. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

nbdime provides tools for diffing and merging of Jupyter Notebooks. In affected versions a stored cross-site scripting (XSS) issue exists within the Jupyter-owned nbdime project. It appears that when reading the file name and path from disk, the extension does not sanitize the string it constructs before returning it to be displayed. The diffNotebookCheckpoint function within nbdime causes this issue. When attempting to display the name of the local notebook (diffNotebookCheckpoint), nbdime appears to simply append .ipynb to the name of the input file. The NbdimeWidget is then created, and the base string is passed through to the request API function. From there, the frontend simply renders the HTML tag and anything along with it. Users are advised to patch to the most recent version of the affected product.

Metrics

CVSS 3.1
5.4/10

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

EPSS Probability
0.68%

47.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
JupyterNbdime>= 1.0.0, < 1.1.1
JupyterNbdime>= 2.0.0, < 2.1.1
JupyterNbdime>= 3.0.0, <= 3.1.1
JupyterNbdime>= 5.0.0, < 5.0.2
JupyterNbdime>= 6.0.0, < 6.1.2
JupyterNbdime-Jupyterlab>= 1.0.0, < 1.0.1
JupyterNbdime-Jupyterlab>= 2.0.0, < 2.1.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-41134?
nbdime provides tools for diffing and merging of Jupyter Notebooks. In affected versions a stored cross-site scripting (XSS) issue exists within the Jupyter-owned nbdime project. It appears that when reading the file name and path from disk, the extension does not sanitize the string it constructs before returning it to be displayed. The diffNotebookCheckpoint function within nbdime causes this issue. When attempting to display the name of the local notebook (diffNotebookCheckpoint), nbdime appears to simply append .ipynb to the name of the input file. The NbdimeWidget is then created, and the base string is passed through to the request API function. From there, the frontend simply renders the HTML tag and anything along with it. Users are advised to patch to the most recent version of the affected product.
How severe is CVE-2021-41134?
CVE-2021-41134 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2021-41134?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41134?

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Source: NVD / NIST