CVE-2021-41134

Stored XSS in Jupyter nbdime

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.

Category

8.7
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.30%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: jupyter nbdime
Published at:
Updated at:

References

Link Tags
https://github.com/jupyter/nbdime/security/advisories/GHSA-p6rw-44q7-3fw4 third party advisory
https://github.com/jupyter/nbdime/commit/e44a5cc7677f24b45ebafc756db49058c2f750ea third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-41134?
CVE-2021-41134 has been scored as a high severity vulnerability.
How to fix CVE-2021-41134?
To fix CVE-2021-41134, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41134 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41134 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41134?
CVE-2021-41134 affects jupyter nbdime.
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