CVE-2021-25940: In ArangoDB, versions v3.7.6 through v3.8.3 are vulnerable to Insufficient Session Expiration

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HIGH 8.8UPGRADE

CVE-2021-25940 is a high-severity flaw (CVSS 8.8) affecting arangodb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In ArangoDB, versions v3.7.6 through v3.8.3 are vulnerable to Insufficient Session Expiration. When a user’s password is changed by the administrator, the session isn’t invalidated, allowing a malicious user to still be logged in and perform arbitrary actions within the system.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-613
Published	2021-11-16
Last modified	2026-06-17

Publisher (CNA): Mend · Vendor: arangodb

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

Am I affected?

Timeline

2021-11-16 10:15 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

arangodb arangodb UPGRADE

Affected: >= 3.7.6 and <= 3.8.3

Fixed in: newer than 3.8.3

Safe to downgrade to: a release before 3.7.6

1. Check installed version

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

2. UPGRADE to newer than 3.8.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arangodb

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 3.7.6 (Debian / Ubuntu)

apt-cache madison arangodb sudo apt install arangodb=<VERSION_BEFORE_3.7.6> sudo apt-mark hold arangodb

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

dnf --showduplicates list arangodb sudo dnf downgrade arangodb-<VERSION_BEFORE_3.7.6> sudo dnf versionlock add arangodb

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-2021-25940?

arangodb: upgrade to newer than 3.8.3. Exact commands for each OS are on this page.

Is CVE-2021-25940 being exploited?

CVE-2021-25940 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-2021-25940 affect?

CVE-2021-25940 affects arangodb. Severity is high (CVSS 8.8). In ArangoDB, versions v3.7.6 through v3.8.3 are vulnerable to Insufficient Session Expiration. When a user’s password is changed by the administrator, the session isn’t invalidated, allowing a malicious user to still be logged in and perfor

How urgent is CVE-2021-25940?

Priority 45/100. High severity

Related CVEs

CVE-2021-25939 LOW 2.7 UPGRADE In ArangoDB, versions v3.7.0 through v3.9.0-alpha.1 have a feature which allows downloading a Foxx service fro
CVE-2021-25938 MEDIUM 6.1 UPGRADE In ArangoDB, versions v2.2.6.2 through v3.7.10 are vulnerable to Cross-Site Scripting (XSS), since there is no

References

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