Security readout for executives and security teams
Plain-English summary
CVE-2000-0900 is an old directory traversal issue in the ssi CGI program shipped with thttpd 2.19 and earlier. A remote attacker could read files outside the intended web directory using encoded parent-directory sequences. Business urgency depends on whether legacy thttpd with ssi CGI is still exposed.
Executive priority
Treat as a legacy-exposure cleanup item. Prioritize if thttpd 2.19 or earlier is internet-facing, embedded in a product, or serving sensitive local files. Otherwise, handle through asset discovery and normal remediation tracking.
Technical view
The flaw is a remote arbitrary file read in thttpd’s ssi CGI component, affecting thttpd 2.19 and earlier per the CVE description. The issue involves encoded “..” traversal input, specifically “%2e%2e”. No CVSS score, CWE, patch version, or detailed vendor remediation is provided in the supplied sources.
Likely exposure
Exposure is likely limited to legacy systems running thttpd 2.19 or earlier with the ssi CGI program reachable over HTTP. Modern environments are only affected if this old component remains deployed, embedded, or bundled in appliances.
Exploitation context
The sources describe remote file-read potential but do not state active exploitation. CISA KEV is false in the provided bundle. Public detail is minimal, and no exploit status beyond the vulnerability description is supported here.
Researcher notes
The provided record lacks CVSS, CWE, CPEs, and explicit fixed-version data. Analysis should center on confirming the presence of thttpd 2.19 or earlier and reachable ssi CGI. Avoid assuming broader thttpd exposure without evidence that the vulnerable CGI is enabled.
Mitigation direction
- Inventory systems for thttpd 2.19 or earlier.
- Check whether the ssi CGI program is installed or web-accessible.
- Disable or remove ssi CGI if it is not required.
- Consult thttpd/vendor guidance for supported upgrade or remediation options.
- Restrict network access to any legacy thttpd service until remediated.
Validation and detection
- Confirm thttpd version on exposed and internal web assets.
- Review web server configuration for enabled CGI and SSI handling.
- Check document roots and CGI directories for the ssi program.
- Review access logs for encoded traversal patterns.
- Verify remediation by confirming vulnerable CGI is unavailable or vendor guidance is applied.
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.
File 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-2000-0900 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
- acme-thttpd-ssi(5313)CVE reference · vdb-entry, x_refsource_XF
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.