Security readout for executives and security teams
Plain-English summary
GravCMS 1.10.7 is reported vulnerable to unauthenticated remote configuration writes that can lead to PHP code execution. A public exploit reference exists, but the provided sources do not show CISA KEV listing or confirmed active exploitation. Internet-exposed GravCMS sites on this version should be treated as urgent.
Executive priority
High priority for any internet-facing GravCMS 1.10.7 deployment. The business risk is full site compromise, data exposure, and service disruption. If affected systems exist, assign immediate remediation ownership and validate no unauthorized configuration changes occurred.
Technical view
The issue is described as missing authorization in GravCMS 1.10.7, allowing arbitrary YAML write/update through a scheduler-related endpoint. Source details indicate attackers may create malicious custom jobs leading to system command execution. CVSS is 9.8 with network, low-complexity, no-privilege, no-user-interaction characteristics.
Likely exposure
Likely exposure is GravCMS 1.10.7 instances, especially public-facing sites with reachable administrative or scheduler functionality. The source bundle names only Getgrav GravCMS 1.10.7 as affected; do not assume other versions without vendor confirmation.
Exploitation context
ExploitDB and VulnCheck references indicate public exploit knowledge. The provided data says KEV is false, and no cited source confirms active exploitation in the wild. The unauthenticated nature and code-execution outcome make exposed systems high risk.
Researcher notes
Evidence is sufficient for critical risk assessment but incomplete on patch status in the provided bundle. Avoid assuming broader version impact. Public exploit availability raises urgency, but active exploitation is not established by KEV or cited sources.
Mitigation direction
- Inventory GravCMS deployments and identify any running version 1.10.7.
- Check GetGrav and VulnCheck guidance for confirmed fixed versions or vendor remediation.
- Prioritize upgrading or replacing affected exposed instances after validation.
- Restrict public access to administrative and scheduler functionality where operationally possible.
- Review configuration and scheduler jobs for unauthorized changes.
Validation and detection
- Confirm the installed GravCMS version on each instance.
- Determine whether the site is reachable from the internet.
- Check whether administrative or scheduler endpoints are externally accessible.
- Review YAML configuration files for unexpected modifications.
- Inspect scheduler/custom jobs for unknown or suspicious entries.
- Review web and application logs for unusual unauthenticated scheduler activity.
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-862: 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 lookupCVE-2021-47812 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.
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:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
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
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49973CVE reference · exploit
- Official Grav CMS HomepageCVE reference · product
- VulnCheck Advisory: GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)CVE reference · 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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.