How severe is CVE-2021-25966?

CVE-2021-25966 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25966?

CVE-2021-25966 primarily affects Orchardcore Orchard Core. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-25966?

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-2021-25966 published?

CVE-2021-25966 was published on 2021-10-10 and last updated on 2026-06-17.

CVE-2021-25966

CVE-2021-25966 is a high-severity vulnerability in Orchardcore Orchard Core 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: 6.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-613
Affected product: Orchardcore Orchard Core
Published: 2021-10-10
Last modified: 2026-06-17

Description

In “Orchard core CMS” application, versions 1.0.0-beta1-3383 to 1.0.0 are vulnerable to an improper session termination after password change. When a password has been changed by the user or by an administrator, a user that was already logged in, will still have access to the application even after the password was changed.

Frequently asked questions

What is CVE-2021-25966?: In “Orchard core CMS” application, versions 1.0.0-beta1-3383 to 1.0.0 are vulnerable to an improper session termination after password change. When a password has been changed by the user or by an administrator, a user that was already logged in, will still have access to the application even after the password was changed.
How severe is CVE-2021-25966?: CVE-2021-25966 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25966?: CVE-2021-25966 primarily affects Orchardcore Orchard Core. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-25966?: 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-2021-25966 published?: CVE-2021-25966 was published on 2021-10-10 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:orchardcore:orchard_core:1.0.0:-:*:*:*:*:*:*
cpe:2.3:a:orchardcore:orchard_core:1.0.0:beta1-3383:*:*:*:*:*:*

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