CVE-2020-11056: In Sprout Forms before 3.9.0, there is a potential Server-Side Template Injection vulnerability when using cus

Q: How do I fix CVE-2020-11056?

sprout forms: upgrade to 3.9.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-11056 being exploited?

CVE-2020-11056 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-11056 affect?

CVE-2020-11056 affects sprout forms. Severity is high (CVSS 7.4). In Sprout Forms before 3.9.0, there is a potential Server-Side Template Injection vulnerability when using custom fields in Notification Emails which could lead to the execution of Twig code. This has been fixed in 3.9.0.

This month

HIGH 7.4UPGRADE

CVE-2020-11056 is a high-severity flaw (CVSS 7.4) affecting sprout forms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Sprout Forms before 3.9.0, there is a potential Server-Side Template Injection vulnerability when using custom fields in Notification Emails which could lead to the execution of Twig code. This has been fixed in 3.9.0.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-94, CWE-74
Published	2020-05-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: barrelstrengthdesign

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

Am I affected?

Timeline

2020-05-07 21:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

barrelstrengthdesign sprout forms UPGRADE

Affected: < 3.9.0

Fixed in: 3.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sprout-forms || rpm -q sprout-forms || sprout-forms --version

2. UPGRADE to 3.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sprout-forms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sprout-forms

Note

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

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-2020-11056?

sprout forms: upgrade to 3.9.0. Exact commands for each OS are on this page.

Is CVE-2020-11056 being exploited?

CVE-2020-11056 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-2020-11056 affect?

CVE-2020-11056 affects sprout forms. Severity is high (CVSS 7.4). In Sprout Forms before 3.9.0, there is a potential Server-Side Template Injection vulnerability when using custom fields in Notification Emails which could lead to the execution of Twig code. This has been fixed in 3.9.0.

How urgent is CVE-2020-11056?

Priority 42/100. High severity

References

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