Security readout for executives and security teams
Plain-English summary
A configuration-dependent flaw can let an unauthenticated attacker become an administrator by registering with the email address of a deactivated administrator. Successful abuse could expose content and sensitive data, permit unauthorized changes, and disrupt the site.
Executive priority
Treat affected, publicly reachable installations as an immediate remediation priority. Administrator compromise could affect confidentiality, integrity, and availability. Rapidly confirm version and registration settings, apply the upgrade, and investigate suspicious account creation or privilege changes.
Technical view
Craft CMS versions before 5.10.11 may preserve the administrator flag from a deactivated account during registration. If public registration is enabled and email verification is disabled, registering the deactivated administrator’s email can create an account with inherited administrator privileges. The issue is categorized as improper privilege management (CWE-269).
Likely exposure
Highest exposure exists on Craft CMS installations before 5.10.11 that allow public registration without email verification and retain deactivated administrator accounts whose email addresses could be reused. Installations lacking any one of these conditions may not be exploitable through the described path.
Exploitation context
The reported path is remote, requires no prior privileges or user interaction, and could yield administrator access. The bundle reports CVSS 9.8. It does not identify known active exploitation, and the CVE is not listed as KEV in the supplied data.
Researcher notes
Exposure depends on the interaction between registration settings and account lifecycle state. Assessment should examine deactivated administrator records, email reuse, new-user creation, and administrator-role changes. The supplied evidence establishes the vulnerability and release boundary but provides no evidence of exploitation in the wild.
Mitigation direction
- Upgrade Craft CMS to version 5.10.11 or later.
- Disable public registration until the upgrade is complete.
- Enable email verification if public registration must remain available.
- Review vendor guidance for any additional remediation or supported release requirements.
Validation and detection
- Confirm the deployed Craft CMS version is 5.10.11 or later.
- Verify whether public user registration is enabled.
- Confirm email verification is required for new registrations.
- Inventory deactivated administrator accounts and review their email addresses for reuse.
- Review recently created users and administrator assignments for unexpected privilege inheritance.
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-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-84795 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:N/S:U/C:H/I:H/A:H3.95.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.2CriticalVector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- GitHub Security Advisory (GHSA-242m-9wq7-vhwq)CVE reference, VulnCheck · vendor-advisory
- VulnCheck Advisory: Craft CMS before 5.10.11 Authentication Bypass via Admin Flag InheritanceCVE reference, VulnCheck · third-party-advisory
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.
CWE mapping pending import
This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.