Security readout for executives and security teams
Plain-English summary
A delegated Grav administrator who can manage users may improperly grant their group super-admin rights. That elevation exposes powerful scheduler and Twig evaluation features, creating a serious risk to site confidentiality, integrity, and availability. Grav releases before 2.0.14 are affected.
Executive priority
Treat this as an urgent privilege-escalation issue. Prioritize internet-facing or business-critical Grav installations and environments with delegated administrators. Upgrade promptly, then review privileged groups and administrator activity for evidence of prior misuse.
Technical view
The core group blueprint does not protect the access field with the required security@: admin.super restriction. Consequently, an operator with delegated admin.users authority can save a group granting admin.super access. This is an improper privilege-management flaw classified as CWE-269 and scored 9.3 under CVSS 4.0.
Likely exposure
Exposure is most likely on Grav versions before 2.0.14 where delegated admin.users operators can create or modify groups. Risk increases when such accounts are numerous, externally accessible, shared, or insufficiently monitored. The supplied evidence does not establish whether default configurations expose the vulnerable workflow.
Exploitation context
The described attack requires access as a delegated admin.users operator, despite the supplied CVSS vector indicating PR:N. Successful abuse elevates that operator to super-admin. The bundle reports no CISA KEV listing and provides no evidence of active exploitation in the wild.
Researcher notes
The primary authorization failure is blueprint-level protection of the group access field. Assessment should distinguish vulnerable product versions from actual reachability by delegated operators. The supplied affected-version representation is ambiguous, but the description and advisory title consistently identify releases before 2.0.14. No exploit status should be inferred beyond the documented privilege-escalation path.
Mitigation direction
- Upgrade Grav to version 2.0.14 or later following vendor guidance.
- Restrict delegated admin.users access until upgrading is complete.
- Review group permissions and remove unauthorized super-admin grants.
- Rotate credentials for accounts showing suspicious privilege changes.
Validation and detection
- Inventory Grav instances and confirm their exact installed versions.
- Identify every account and group holding admin.users or admin.super access.
- Review group configuration for unexpected admin.super permissions.
- Check available audit records for recent group or privilege changes.
- Confirm delegated operators cannot assign super-admin rights after upgrading.
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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-75837 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
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H2.36VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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-xhfv-7758-r9hx)CVE reference, VulnCheck · vendor-advisory
- VulnCheck Advisory: Grav before 2.0.14 Privilege Escalation via Group Access FieldCVE 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.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.