Security readout for executives and security teams
Plain-English summary
CVE-2021-47900 is a critical remote code execution issue in Gila CMS before 2.0.0. An unauthenticated attacker could abuse crafted HTTP headers against an admin endpoint to run system commands. For any internet-facing Gila CMS site, this should be treated as urgent because compromise could affect confidentiality, integrity, and availability.
Executive priority
Treat as an immediate remediation priority for any exposed Gila CMS deployment. The business risk is full server compromise, but urgency depends on whether the product is deployed and reachable.
Technical view
The reported flaw is CWE-98 and has CVSS 9.8. Public advisories describe unauthenticated command execution via manipulated request headers reaching the admin endpoint in Gila CMS versions earlier than 2.0.0. Exploit-DB has a public exploit reference, but the provided sources do not establish active exploitation in the wild.
Likely exposure
Highest exposure is internet-facing Gila CMS instances running versions before 2.0.0, especially where administrative paths are reachable. Internal-only deployments still carry risk if reachable by untrusted users or compromised systems.
Exploitation context
The vulnerability is network-reachable, low-complexity, and requires no authentication or user interaction. A public Exploit-DB entry exists. CISA KEV status is not indicated, and the provided sources do not confirm active exploitation.
Researcher notes
Evidence is based on the CVE record, VulnCheck advisory, and Exploit-DB reference. The source bundle names Gila CMS before 2.0.0 as affected. No KEV listing or cited source confirms active exploitation. Avoid assuming additional affected forks or downstream packages without separate evidence.
Mitigation direction
- Inventory all Gila CMS deployments and identify versions in use.
- Prioritize upgrade planning for any version earlier than 2.0.0.
- Check Gila CMS vendor and repository guidance for current fixed releases.
- Restrict public access to administrative endpoints where operationally possible.
- Review web server and application logs for suspicious header-based requests.
Validation and detection
- Confirm whether Gila CMS is deployed in production or exposed environments.
- Verify the running Gila CMS version against the 2.0.0 threshold.
- Check whether admin endpoints are reachable from the internet.
- Review logs for abnormal requests targeting administrative paths.
- Document remediation status and remaining externally reachable instances.
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-98: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47900 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-49412CVE reference · exploit
- Official Vendor HomepageCVE reference · product
- Gila CMS GitHub RepositoryCVE reference · product
- VulnCheck Advisory: Gila CMS < 2.0.0 - Remote Code ExecutionCVE 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.
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.