How severe is CVE-2021-25940?

CVE-2021-25940 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25940?

CVE-2021-25940 affects Arangodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-25940 published?

CVE-2021-25940 was published on 2021-11-16 and last updated on 2026-06-17.

CVE-2021-25940

CVE-2021-25940 is a high-severity vulnerability in Arangodb with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-613.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-613
Affected product: Arangodb
Published: 2021-11-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-25940?: 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.
How severe is CVE-2021-25940?: CVE-2021-25940 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25940?: CVE-2021-25940 affects Arangodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-25940 published?: CVE-2021-25940 was published on 2021-11-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:arangodb:arangodb:*:*:*:*:*:*:*:*

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CVE-2026-21622 — Critical (CVSS 9.8): Insufficient Session Expiration vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Accounts.PasswordReset' module)…
CVE-2025-59786 — Critical (CVSS 9.8): 2N Access Commander version 3.4.2 and prior improperly invalidates session tokens, allowing multiple session cookies to…
CVE-2026-26342 — Critical (CVSS 9.8): Tattile Smart+, Vega, and Basic device families firmware versions 1.181.5 and prior implement an authentication token…
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