Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in remote administrator run operating-system commands through the control panel server edit function. The attacker already needs high privileges, but successful abuse can compromise confidentiality, integrity, and availability of the hosted server.
Executive priority
Treat as a high-priority server administration risk, not a broad unauthenticated internet worm risk. Patch exposed or shared-admin panels promptly because compromise after admin access can affect the underlying server.
Technical view
CVE-2021-46850 is a CWE-88 command injection in myVesta before 0.9.8-26-43 and Vesta before 0.9.8-26. The vulnerable input is the v_sftp_license parameter in HTTP POST requests to /edit/server, reachable by authenticated remote administrative users.
Likely exposure
Exposure is most likely on internet-reachable myVesta or Vesta control panels running the vulnerable versions, especially where multiple administrators or reused credentials exist. The bundle does not identify CPEs or downstream packaged products.
Exploitation context
The bundle references Exploit-DB, so public exploit material exists. It also references a Talos botnet article, but the provided evidence does not confirm current active exploitation. CISA KEV status is false in the bundle.
Researcher notes
The affected parameter and endpoint are identified, but the bundle lacks detailed patch mechanics, exploit telemetry, and affected CPEs. Avoid assuming unauthenticated reachability; privilege requirement is high under CVSS.
Mitigation direction
- Upgrade myVesta to 0.9.8-26-43 or later.
- Upgrade Vesta Control Panel to 0.9.8-26 or later.
- Restrict administrative panel access to trusted networks or VPN.
- Review vendor release notes and commits for exact remediation details.
- Audit administrative accounts and remove unnecessary privileged users.
Validation and detection
- Inventory all myVesta and Vesta control panel instances.
- Confirm installed versions against the vulnerable version ranges.
- Check whether /edit/server is reachable from untrusted networks.
- Review admin audit logs for unexpected server edit activity.
- Verify administrative accounts have expected owners and MFA where supported.
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-88: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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-2021-46850 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/myvesta/vesta/releases/tag/0.9.8-26-43CVE reference
- https://github.com/myvesta/vesta/commit/7991753ab7c5c568768028fb77554db8ea149f17CVE reference
- https://github.com/serghey-rodin/vesta/commit/a4e4542a6d1351c2857b169f8621dd9a13a2e896CVE reference
- https://www.exploit-db.com/exploits/49674CVE reference
- https://blog.talosintelligence.com/2021/06/necro-python-bot-adds-new-tricks.htmlCVE reference
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 Neutralization of Argument Delimiters in a Command ('Argument Injection')
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.