CVE-2021-25962: “Shuup” application in versions 0.4.2 to 2.10.8 is affected by the “Formula Injection” vulnerability

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HIGH 8.0UPGRADE

CVE-2021-25962 is a high-severity flaw (CVSS 8.0) affecting shuup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

“Shuup” application in versions 0.4.2 to 2.10.8 is affected by the “Formula Injection” vulnerability. A customer can inject payloads in the name input field in the billing address while buying a product. When a store administrator accesses the reports page to export the data as an Excel file and opens it, the payload gets executed.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-1236
Published	2021-09-29
Last modified	2026-06-17

Publisher (CNA): Mend · Vendor: shuup

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-09-29 14:15 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

shuup shuup UPGRADE

Affected: >= 0.4.2 and < 2.11.0

Fixed in: 2.11.0

Safe to downgrade to: a release before 0.4.2

1. Check installed version

apt-cache policy shuup || rpm -q shuup || shuup --version

2. UPGRADE to 2.11.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade shuup

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade shuup

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.4.2 (Debian / Ubuntu)

apt-cache madison shuup sudo apt install shuup=<VERSION_BEFORE_0.4.2> sudo apt-mark hold shuup

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list shuup sudo dnf downgrade shuup-<VERSION_BEFORE_0.4.2> sudo dnf versionlock add shuup

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-25962?

shuup: upgrade to 2.11.0. Exact commands for each OS are on this page.

Is CVE-2021-25962 being exploited?

CVE-2021-25962 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-25962 affect?

CVE-2021-25962 affects shuup. Severity is high (CVSS 8.0). “Shuup” application in versions 0.4.2 to 2.10.8 is affected by the “Formula Injection” vulnerability. A customer can inject payloads in the name input field in the billing address while buying a product. When a store administrator accesses

How urgent is CVE-2021-25962?

Priority 44/100. High severity

Related CVEs

CVE-2021-25963 MEDIUM 6.1 UPGRADE In Shuup, versions 1.6.0 through 2.10.8 are vulnerable to reflected Cross-Site Scripting (XSS) that allows exe

References

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