Security readout for executives and security teams
Plain-English summary
CVE-2020-18660 is an open redirect issue in GetSimpleCMS version 3.3.15 and earlier. A crafted use of the documented url parameter could cause the application to send users to an unintended site. The main business risk is phishing or trust abuse, not direct server takeover based on the supplied sources.
Executive priority
Prioritize inventory and remediation for internet-facing GetSimpleCMS sites. This is not evidenced as actively exploited, but it can support credible phishing because victims may see a trusted domain before being redirected.
Technical view
The CVE describes an open redirect in admin/changedata.php, specifically through the redirect function using the url parameter. The source bundle does not provide CVSS, CWE, authentication requirements, patch details, or confirmed exploitation. Scope should be limited to GetSimpleCMS <=3.3.15 unless vendor sources say otherwise.
Likely exposure
Exposure is likely limited to organizations running GetSimpleCMS 3.3.15 or earlier, especially where administrative paths are reachable by users or the internet. The bundle does not identify affected CPEs, deployment patterns, or fixed versions.
Exploitation context
The issue is publicly disclosed through CVE and related vulnerability references. CISA KEV is false, and the provided sources do not claim active exploitation. Treat this as a phishing and redirect-abuse risk unless new vendor or threat-intelligence evidence says otherwise.
Researcher notes
Evidence is thin: no CVSS vector, CWE, CPE, patch reference, or exploit-in-the-wild claim is included. Validate against source code and vendor project history before expanding scope beyond GetSimpleCMS <=3.3.15.
Mitigation direction
- Identify any GetSimpleCMS deployments and record their versions.
- Check GetSimpleCMS vendor guidance for fixed releases or official workarounds.
- Restrict access to administrative paths where operationally possible.
- Validate redirect destinations against trusted local paths or approved domains.
- Monitor requests to admin/changedata.php containing external url values.
Validation and detection
- Confirm whether GetSimpleCMS 3.3.15 or earlier exists in the environment.
- Review admin/changedata.php behavior for url-driven redirect handling.
- Check logs for unusual admin/changedata.php requests with external destinations.
- Verify any update or workaround blocks untrusted external redirects.
- Document exposure status and owner for each identified deployment.
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.
CVE-2020-18660 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1310CVE reference · x_refsource_MISC
- https://github.com/LoRexxar/CVE_Request/blob/master/getsimplecms%20v3.3.15/getsimplecms_before_v3.3.15.mdCVE reference · x_refsource_MISC
- https://www.seebug.org/vuldb/ssvid-97928CVE reference · x_refsource_MISC
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.