01 Record
CVE-2026-64637
Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated reseller to obtain an administrative session for the root user account.
CriticalPUBLISHEDCNA: hackerone
CNA base score9.9 CVSS v3.xCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
02 Description
Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated reseller to obtain an administrative session for the root user account.
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.47% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 40.4% of scored records. A rank, not a probability.
- NVD base score
- 9.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-24.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-07 17:57Z2 MO AGO
- Last updated
- 2026-08-07 18:25Z2 MO AGO
- Reserved
- 2026-07-20
- Assigning CNA
- hackerone
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.9)
- CNA CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-269Improper Privilege ManagementClass
- Data version
- 5.2
- Document digest
- 50887469b2b660567819db10a7dcf32bfbe2e9b73124a626b5809d8455dae052
05 Affected products
VendorProductVersionsPlatforms
06 References
- support.plesk.comhttps://support.plesk.com/hc/en-us/articles/42432168683799