CVE-2021-31777: The dce (aka Dynamic Content Element) extension 2.2.0 through 2.6.x before 2.6.2, and 2.7.x before 2.7.1, for

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MEDIUM 4.9UPGRADE

CVE-2021-31777 is a medium-severity flaw (CVSS 4.9) affecting dynamic content elements. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The dce (aka Dynamic Content Element) extension 2.2.0 through 2.6.x before 2.6.2, and 2.7.x before 2.7.1, for TYPO3 allows SQL Injection via a backend user account.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-04-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dynamic content elements project

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

Am I affected?

Timeline

2021-04-28 07:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

dynamic content elements project dynamic content elements UPGRADE

Affected: >= 2.2.0 and < 2.6.2 · >= 2.7.0 and < 2.7.1

Fixed in: 2.6.2, 2.7.1

Safe to downgrade to: a release before 2.2.0

1. Check installed version

apt-cache policy dynamic-content-elements || rpm -q dynamic-content-elements || dynamic-content-elements --version

2. UPGRADE to 2.6.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dynamic-content-elements

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dynamic-content-elements

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 2.2.0 (Debian / Ubuntu)

apt-cache madison dynamic-content-elements sudo apt install dynamic-content-elements=<VERSION_BEFORE_2.2.0> sudo apt-mark hold dynamic-content-elements

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

dnf --showduplicates list dynamic-content-elements sudo dnf downgrade dynamic-content-elements-<VERSION_BEFORE_2.2.0> sudo dnf versionlock add dynamic-content-elements

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-2021-31777?

dynamic content elements: upgrade to 2.6.2, 2.7.1. Exact commands for each OS are on this page.

Is CVE-2021-31777 being exploited?

CVE-2021-31777 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-2021-31777 affect?

CVE-2021-31777 affects dynamic content elements. Severity is medium (CVSS 4.9). The dce (aka Dynamic Content Element) extension 2.2.0 through 2.6.x before 2.6.2, and 2.7.x before 2.7.1, for TYPO3 allows SQL Injection via a backend user account.

How urgent is CVE-2021-31777?

Priority 40/100. Public exploit reference

Software pages

TYPO3 vulnerabilities

Related CVEs

CVE-2014-8328 MEDIUM 5.3 UPGRADE The default configuration in the Dynamic Content Elements (dce) extension before 0.11.5 for TYPO3 allows remot

References

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