Security readout for executives and security teams
Plain-English summary
CVE-2019-19733 is a cross-site scripting issue in MFScripts YetiShare. Affected versions may display attacker-supplied input from the fileIds parameter without proper sanitization or encoding, allowing script execution in a user’s browser. Public sources do not provide a CVSS score or evidence of active exploitation.
Executive priority
Prioritize this if YetiShare is internet-facing or used by privileged users. Without active exploitation evidence or CVSS, it is not automatically critical, but browser-based script execution can still expose accounts, data, and administrative workflows.
Technical view
The affected YetiShare endpoint _get_all_file_server_paths.ajax.php, also named get_all_file_server_paths.ajax.php, fails to sanitize or encode output from fileIds. Sources identify YetiShare 3.5.2 through 4.5.3 as affected. The issue is described as XSS; authentication requirements, patch version, and exploit prevalence are not established in the supplied sources.
Likely exposure
Exposure is likely limited to organizations running MFScripts YetiShare 3.5.2 through 4.5.3 with the affected AJAX endpoint reachable. The source bundle does not clarify whether authentication is required or how commonly these versions remain deployed.
Exploitation context
The CVE is public and has a researcher write-up and GitHub reference. The source bundle marks CISA KEV as false and provides no cited evidence of exploitation in the wild. Treat exploit status as unconfirmed, not actively exploited.
Researcher notes
The public record is sparse: no CVSS, CWE, CPE, patch version, or authentication context is supplied. Analysis should stay tied to the named endpoint, fileIds parameter, affected version range, and XSS impact until vendor or maintainer evidence adds detail.
Mitigation direction
- Inventory YetiShare deployments and identify versions 3.5.2 through 4.5.3.
- Check MFScripts or vendor guidance for supported fixes or upgrade paths.
- Apply vendor-supported updates before custom code changes where available.
- Ensure fileIds output is encoded before rendering in any maintained fork.
- Restrict access to affected administrative or file-management paths where feasible.
- Monitor application logs for suspicious fileIds parameter activity.
Validation and detection
- Confirm whether the affected AJAX file exists in deployed YetiShare instances.
- Verify the deployed YetiShare version against the affected range.
- Review response rendering to ensure fileIds content is encoded, not interpreted as HTML.
- Use a benign marker test in a controlled environment to confirm safe output handling.
- Check web and application logs for unusual requests to the affected endpoint.
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-2019-19733 mapping review
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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://medium.com/%40jra8908/yetishare-3-5-2-4-5-3-multiple-vulnerabilities-2d01d0cd7459CVE reference · x_refsource_MISC
- https://github.com/jra89/CVE-2019-19733CVE 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.