Security readout for executives and security teams
Plain-English summary
CVE-2018-25158 is a high-severity Chamilo LMS issue where a logged-in user can upload a file through the elfinder file manager and have it treated as executable PHP. If exploited, this can let an attacker run code on the server hosting the learning platform.
Executive priority
Prioritize remediation for internet-facing Chamilo systems. The issue can become server code execution after login, and public exploit information exists. No active exploitation is confirmed in the provided sources, but business impact could be severe if an LMS server is compromised.
Technical view
The issue is CWE-434 unrestricted file upload in Chamilo LMS 1.11.8, with affected versions described as 1.8 through 1.11.8. The CVSS 3.1 score is 8.8. Exploitation requires valid authentication but no user interaction, and can lead to confidentiality, integrity, and availability compromise.
Likely exposure
Exposure is most relevant for organizations running Chamilo LMS versions 1.8 through 1.11.8, especially internet-accessible deployments with authenticated user access to file-management or social file features.
Exploitation context
Public exploit information exists in Exploit-DB, and VulnCheck lists the issue. The source bundle does not show CISA KEV listing or confirmed active exploitation. Treat this as plausible to test and abuse where vulnerable Chamilo instances are reachable.
Researcher notes
The record is newly published for an older-version issue and references Exploit-DB 47423. The bundle does not identify a specific fixed Chamilo release or vendor advisory. Validate version scope and remediation from Chamilo-maintained sources before final change planning.
Mitigation direction
- Identify all Chamilo LMS deployments and confirm their versions.
- Check Chamilo vendor guidance, repository, and release notes for fixed versions.
- Prioritize upgrading or replacing affected versions once a vendor-supported fix is identified.
- Reduce exposure of Chamilo instances while remediation is assessed.
- Limit LMS accounts to trusted users and review file-upload permissions.
Validation and detection
- Inventory Chamilo LMS assets, including externally hosted learning portals.
- Confirm whether versions fall within 1.8 through 1.11.8.
- Review whether elfinder or related file-management features are enabled.
- Check web server logs for suspicious uploaded PHP file access.
- Review uploaded user files for unexpected executable extensions.
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-434: 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 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 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-2018-25158 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-47423CVE reference · exploit
- Chamilo LMS GitHub RepositoryCVE reference · product
- VulnCheck Advisory: Chamilo LMS 1.11.8 Arbitrary File Upload via elfinderCVE 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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.