Security readout for executives and security teams
Plain-English summary
This flaw affects Hestia Control Panel and lets a logged-in attacker write files to arbitrary server locations through an API endpoint. That could enable account takeover, persistence, data theft, or service disruption. Public exploit material exists, but the provided sources do not show active exploitation.
Executive priority
High priority for any organization running Hestia Control Panel, especially internet-facing or multi-user hosting systems. Address promptly because a normal authenticated account may be enough to gain broad server impact.
Technical view
CVE-2021-47871 is an authenticated arbitrary file write in Hestia Control Panel via the API index.php endpoint and v-make-tmp-file command. It is mapped to CWE-73 with CVSS 8.8. Sources describe Hestia 1.3.2, while the supplied affected entry lists 1.3.3, so version scope should be verified against vendor data.
Likely exposure
Exposure is limited to organizations running Hestia Control Panel with authenticated panel/API access reachable by attackers. Internet-exposed admin panels, shared hosting environments, weak credentials, and compromised lower-privilege accounts increase risk.
Exploitation context
ExploitDB is cited, so public exploit information exists. The CVE is not marked KEV in the provided bundle, and no cited source confirms active exploitation in the wild.
Researcher notes
The public record indicates arbitrary file write with high confidentiality, integrity, and availability impact. Version evidence is inconsistent between the title/advisory text and supplied affected metadata. Do not assume active exploitation without additional telemetry or KEV listing.
Mitigation direction
- Check Hestia vendor guidance and repository for fixed or supported versions.
- Prioritize upgrading or replacing affected 1.3.x installations if vendor guidance confirms exposure.
- Restrict Hestia panel/API access to trusted networks or VPN.
- Audit Hestia user accounts and remove unnecessary access.
- Rotate credentials if suspicious file writes or account compromise are suspected.
- Review server integrity and backups before restoring trusted files.
Validation and detection
- Inventory all Hestia Control Panel deployments and versions.
- Treat 1.3.2 as specifically indicated by advisories.
- Verify whether 1.3.3 is affected due to conflicting supplied data.
- Check whether the panel/API is internet reachable.
- Review logs for unusual authenticated API activity.
- Inspect sensitive paths for unexpected files or key additions.
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-73: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47871 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49667CVE reference · exploit
- Hestia Control Panel Official HomepageCVE reference · product
- Hestia Control Panel GitHub RepositoryCVE reference · product
- VulnCheck Advisory: Hestia Control Panel 1.3.2 - Arbitrary File WriteCVE 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.
External Control of File Name or Path
External Control of File Name or Path represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.