CVE Explorer

CVE-2026-56843

Incorrect authorization in the XML-RPC API of WebPros Plesk before 18.0.78.4 allows a low-privileged authenticated customer to look up domains they do not own, because ownership is enforced only for certain lookup filters and schema validation is bypassed for legacy protocol versions. This results in cross-tenant disclosure of other tenants' FTP credentials stored in cleartext, which can be leveraged to execute code as another tenant's system user.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ea51d9b617d78d2fd3dd7295dba2d71d45261c758086c9d9127729ff8fe273f4

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Plesk","vendor":"Webpros","versions":[{"lessThan":"18.0.78.4","status":"affected","version":"10.4","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:d2beb57be6621736c7c8602743d5021d6c11b24099a8c837f2223173a7ba3185 · sha256:d6fb1a47f2f280aa… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":9.9,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:d2beb57be6621736c7c8602743d5021d6c11b24099a8c837f2223173a7ba3185 · sha256:d6fb1a47f2f280aa… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-522","description":"CWE-522 Insufficiently Protected Credentials","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:d2beb57be6621736c7c8602743d5021d6c11b24099a8c837f2223173a7ba3185 · sha256:d6fb1a47f2f280aa… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"url":"https://support.plesk.com/hc/en-us/articles/41178305151255-Vulnerability-in-Plesk-XML-API-Cleartext-FTP-Password-Exposure"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:d2beb57be6621736c7c8602743d5021d6c11b24099a8c837f2223173a7ba3185 · sha256:d6fb1a47f2f280aa… · /containers/cna/references/0

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.

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