CVE Explorer
CVE-2026-53903
MCO is vulnerable to an Insecure Direct Object Reference (IDOR) vulnerability in the /customer/servlet/mco/webapi/trading-document/fetchPdfStatement endpoint. The application does not properly validate whether an authenticated user is authorized to access a requested document, allowing direct retrieval based on a user-supplied identifier.
An attacker can access trading documents belonging to other users by providing a valid document ID. Although exploitation requires guessing the identifier, pre
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unknown","product":"MCO","vendor":"MyComplianceOffice","versions":[{"status":"affected","version":"25.3.3.1","versionType":"custom"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:8f8b4cf65b261d607af8bda5fd1bf7d41e687b4b5814a5fc8a5cd0161e7c0d87 · sha256:fa559d08b00e4f50… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:8f8b4cf65b261d607af8bda5fd1bf7d41e687b4b5814a5fc8a5cd0161e7c0d87 · sha256:fa559d08b00e4f50… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-639","description":"CWE-639 Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:8f8b4cf65b261d607af8bda5fd1bf7d41e687b4b5814a5fc8a5cd0161e7c0d87 · sha256:fa559d08b00e4f50… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["third-party-advisory"],"url":"https://cert.pl/en/posts/2026/07/CVE-2026-53902"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:8f8b4cf65b261d607af8bda5fd1bf7d41e687b4b5814a5fc8a5cd0161e7c0d87 · sha256:fa559d08b00e4f50… · /containers/cna/references/0
{"tags":["product"],"url":"https://mco.mycomplianceoffice.com/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:8f8b4cf65b261d607af8bda5fd1bf7d41e687b4b5814a5fc8a5cd0161e7c0d87 · sha256:fa559d08b00e4f50… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.