CVE-2021-25963

Name: CVE-2021-25963
Creator: NVD / NIST
Published: 2021-09-30T08:15:06.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2021-25963 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In Shuup, versions 1.6.0 through 2.10.8 are vulnerable to reflected Cross-Site Scripting (XSS) that allows execution of arbitrary javascript code on a victim browser. This vulnerability exists due to the error page contents not escaped.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

In Shuup, versions 1.6.0 through 2.10.8 are vulnerable to reflected Cross-Site Scripting (XSS) that allows execution of arbitrary javascript code on a victim browser. This vulnerability exists due to the error page contents not escaped.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.92%

55.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Shuup	Shuup	>= 1.6.0, <= 2.10.8

References

https://github.com/shuup/shuup/commit/75714c37e32796eb7cbb0d977af5bcaa26573588Patch, Third Party Advisory
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25963Third Party Advisory
https://github.com/shuup/shuup/commit/75714c37e32796eb7cbb0d977af5bcaa26573588Patch, Third Party Advisory
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25963Third Party Advisory

Timeline

Published: Sep 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25963?

How severe is CVE-2021-25963?

CVE-2021-25963 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25963?

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-2021-25963?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST