Security readout for executives and security teams
Plain-English summary
PacsOne Server, a medical imaging system used to store and view DICOM scans, has a flaw in its web viewer that lets anyone on the network read files from the server without logging in. Attackers can pull configuration files, credentials, or patient data simply by crafting a web request, raising clear privacy and compliance concerns.
Executive priority
High priority for any organization running PacsOne Server, especially healthcare providers. The flaw is unauthenticated, exploit code is public, and active exploitation has been reported, creating direct PHI exposure and regulatory risk that warrants immediate inventory and containment this week.
Technical view
A path traversal weakness (CWE-22) in PacsOne Server 6.6.2's DICOM web viewer allows an unauthenticated remote attacker to abuse the 'nocache.php' endpoint's 'path' parameter to read arbitrary files outside the intended directory. CVSS 4.0 scores it 8.7 (high) with network attack vector, no privileges, and high confidentiality impact.
Likely exposure
Healthcare or research environments running PacsOne Server 6.6.2 (and likely earlier) with the DICOM web viewer reachable from internal users or the internet. Shadowserver observed exploitation activity on 2025-02-02, indicating opportunistic scanning targets internet-facing instances.
Exploitation context
Public exploit code exists on Exploit-DB (43907) and a VulnCheck advisory documents the issue. The CVE is not listed in CISA KEV, but Shadowserver telemetry cited in the bundle confirms in-the-wild exploitation, so opportunistic abuse should be assumed.
Researcher notes
Vulnerability is a classic LFI via the 'path' parameter in 'nocache.php'. CVSS 4.0 vector reflects confidentiality-only impact, but on medical imaging hosts that confidentiality blast radius includes PHI and credentials. No vendor patch is named in the source bundle; verify directly with RainbowFish Software before recommending a fixed version. Sources do not list specific CPEs.
Mitigation direction
- Inventory PacsOne Server deployments and confirm version, network exposure, and viewer accessibility.
- Restrict the DICOM web viewer to trusted networks via firewall, VPN, or reverse proxy ACLs.
- Check RainbowFish Software/PacsOne vendor pages for an updated build addressing this traversal flaw.
- Block or filter requests to 'nocache.php' containing traversal sequences at a WAF or proxy.
- Rotate any credentials or secrets stored on the server that may have been exposed.
- Treat affected systems as PHI-handling and engage compliance teams to assess breach disclosure obligations.
Validation and detection
- Identify all hosts running PacsOne Server and record exposed ports and reachable endpoints.
- Review web server and application logs for requests to 'nocache.php' with suspicious 'path' values.
- Confirm whether the DICOM web viewer is reachable from untrusted networks or the public internet.
- Cross-reference Shadowserver and threat intel feeds for source IPs targeting your ranges.
- Validate compensating controls (WAF rules, ACLs) actually block traversal payloads in a test request.
- After remediation, re-test the endpoint to confirm arbitrary file reads are no longer possible.
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-22: 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 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-2018-25124 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
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.exploit-db.com/exploits/43907CVE reference · exploit
- https://pacsone.net/download.htmCVE reference · product
- https://www.vulncheck.com/advisories/pacsone-server-dicom-web-viewer-directory-traversal-lfiCVE 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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.