Security readout for executives and security teams
Plain-English summary
Grav CMS administrators could be tricked into visiting a malicious website that causes the Grav Scheduler to run a system command. The business risk is highest where Grav admin sessions are active and the admin interface is reachable. Public sources do not show CISA KEV listing or confirmed active exploitation.
Executive priority
Treat as a priority for any production Grav CMS deployment because the reported impact is system command execution, even though exploitation requires admin interaction and active exploitation is not evidenced here.
Technical view
CVE-2020-29553 is a CSRF issue in Grav CMS Scheduler through 1.7.0-rc.17. The reported impact is system command execution after an attacker induces an authenticated administrator to visit attacker-controlled content. The provided CVE data does not include CVSS, CWE, CPEs, or a named patch.
Likely exposure
Organizations running Grav CMS through 1.7.0-rc.17 are potentially exposed, especially if administrators use the Scheduler and access the admin panel from normal browsing sessions.
Exploitation context
The documented attack path requires administrator interaction and an authenticated admin context. The bundle does not provide evidence of public exploitation, weaponized tooling, or CISA KEV inclusion.
Researcher notes
The source bundle is sparse: no CVSS, CWE, CPE, or explicit fix version is provided. Analysis should center on Grav CMS Scheduler through 1.7.0-rc.17, CSRF preconditions, administrator session exposure, and vendor advisory confirmation.
Mitigation direction
- Identify Grav CMS instances and their exact versions.
- Check Grav vendor guidance for the fixed release or supported upgrade path.
- Restrict Grav admin access to trusted users and networks.
- Disable or limit Scheduler use if it is not operationally required.
- Reduce admin browsing risk by separating admin sessions from general web browsing.
Validation and detection
- Inventory Grav CMS versions and flag deployments through 1.7.0-rc.17.
- Confirm whether Scheduler functionality is enabled or used.
- Review admin access paths and exposure to the internet.
- Check logs for unexpected Scheduler activity or command execution indicators.
- Document whether vendor remediation has been applied.
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.
CVE-2020-29553 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://blog.bssi.fr/cve-2020-29553-cve-2020-29555-cve-2020-29556-multiple-vulnerabilities-within-cms-grav/CVE 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.