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CVE-2021-25963

21
FAUCET Score

CVE-2021-25963 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Shuup versions 1.6.0 through 2.10.8, stemming from unescaped error page content. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low complexity, requiring user interaction, and could lead to arbitrary JavaScript execution on a victim's browser, resulting in limited confidentiality and integrity impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.6.0, <= 2.10.8CPE matchmatch criteria
cpe:2.3:a:shuup:shuup:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.95%
Probability of exploitation in next 30 days
EPSS Percentile
57.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0095 is in the 70th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: shuupFixed in: 2.11.0

Vendor Advisories (1)

pipGHSA-5pcx-vqjp-p34wmedium

Cross-site Scripting in shuup

Oct 4, 2021

References

github.com / shuup/shuup/commit/75714c37e32796eb7cbb0d977af5bcaa26573588
PatchThird Party Advisory
whitesourcesoftware.com / vulnerability-database/CVE-2021-25963
Third Party Advisory