In Public Knowledge Project (PKP) OJS, OMP, and OPS before 3.3.0.21 and 3.4.x before 3.4.0.8, an XXE attack by the Journal Editor Role can create a new role as super admin in the journal context, and insert a backdoor plugin, by uploading a crafted XML document as a User XML Plugin.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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