Security readout for executives and security teams
Plain-English summary
Orchard Core CMS did not reliably end existing login sessions after a password was changed. If a session was already active, changing the password would not necessarily remove access, weakening account recovery and incident containment.
Executive priority
Treat as high priority for affected CMS deployments because password resets may not remove access. Prioritize confirmation of version exposure and vendor-directed remediation, especially on public sites or systems with privileged CMS users.
Technical view
CVE-2021-25966 is CWE-613 improper session termination in OrchardCore Users versions 1.0.0-beta1-3383 through 1.0.0. Existing authenticated sessions can remain valid after user or administrator password changes. CVSS 3.1 is 8.8 high.
Likely exposure
Exposure is likely limited to Orchard Core CMS deployments using the affected OrchardCore Users versions. Internet-facing CMS instances and sites relying on password resets to contain suspected account compromise have the highest practical risk.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The main abuse scenario is continued access from an already valid session after a password change, not unauthenticated remote takeover by itself.
Researcher notes
Evidence identifies the affected component and behavior, but the bundle does not provide a fixed version or exploitation reports. Keep analysis scoped to OrchardCore Users and validate behavior without publishing offensive reproduction details.
Mitigation direction
- Identify Orchard Core CMS deployments and installed OrchardCore Users versions.
- Check Orchard Core vendor guidance for the fixed release or recommended remediation.
- Upgrade affected deployments when vendor guidance identifies a fixed version.
- Force logout or revoke active sessions after password changes where supported.
- Review incident playbooks so password resets include session invalidation checks.
Validation and detection
- Confirm whether any deployment runs versions 1.0.0-beta1-3383 through 1.0.0.
- Test in a controlled environment that password changes invalidate existing sessions.
- Review authentication logs for sessions continuing after password reset events.
- Verify operational procedures revoke sessions during account compromise response.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-613: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-25966 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25966CVE reference · x_refsource_MISC
- https://github.com/OrchardCMS/OrchardCore/blob/v1.0.0/src/OrchardCore.Modules/OrchardCore.Users/Controllers/ResetPasswordController.cs#L123CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Session Expiration
Insufficient Session Expiration represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.