Security readout for executives and security teams
Plain-English summary
CVE-2021-3855 is a high-severity command injection issue in Liman Central Management System. An attacker with a low-privileged account could potentially make the system run unintended commands, creating serious confidentiality, integrity, and availability risk.
Executive priority
Treat as a high-priority remediation item for any organization using Liman Central Management System. The issue could affect core system control, but urgency depends on whether affected versions are deployed and who can reach the management interface.
Technical view
The CVE describes CWE-77 command injection in Liman MYS HTTP/Controllers, CronMail, and Jobs modules. It affects Liman Central Management System from 1.7.0 before 1.8.3-462. CVSS 3.1 is 8.8: network reachable, low complexity, low privileges required, no user interaction, high C/I/A impact.
Likely exposure
Exposure is likely limited to organizations running Liman Central Management System versions 1.7.0 through versions before 1.8.3-462. Risk is higher where the management interface is reachable by broad internal networks or the internet.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates exploitation would require network access and a low-privileged account, but no user interaction.
Researcher notes
Evidence is sufficient for affected range, modules, CWE, and CVSS interpretation. The provided sources do not include exploit details, active exploitation evidence, or detailed vendor-side fix mechanics beyond the version boundary.
Mitigation direction
- Upgrade affected Liman installations to 1.8.3-462 or later.
- Review Liman security guidance for vendor-confirmed remediation details.
- Restrict management interface access to trusted administrative networks.
- Audit low-privileged accounts with Liman access.
- Monitor vendor and government advisories for updated guidance.
Validation and detection
- Inventory Liman Central Management System deployments and versions.
- Flag any deployment from 1.7.0 before 1.8.3-462.
- Verify management interfaces are not broadly exposed.
- Review logs for suspicious activity in affected modules.
- Confirm remediation against vendor or government advisory guidance.
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-77: 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-2021-3855 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.
SSVC decision data
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:H2.85.9TR-CERTVulnerability 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.liman.dev/baslangic/guvenlikCVE reference, TR-CERT · release-notes
- https://www.usom.gov.tr/bildirim/tr-23-0109CVE reference, TR-CERT · government-resource, broken-link
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0109CVE reference, TR-CERT · government-resource
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 Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.