Description
PKP Open Journal Systems through 3.5.0-5 contains an insecure direct object reference vulnerability that allows journal or subscription managers to access other journals' subscriptions by supplying arbitrary subscription ids. Attackers can enumerate sequential ids through editSubscription to view subscriber details and use updateSubscription to reassign subscriptions to their own journal, revoking victims' access.
References5
- github.com/pkp/ojs/blob/3_5_0-5/controllers/grid/subscriptions/…
- github.com/pkp/ojs/blob/3_5_0-5/controllers/grid/subscriptions/…
- hackmd.io/@hieuPenguinnn/ojs-subscription-form-cross-journal-id…
- www.vulncheck.com/advisories/pkp-open-journal-systems-through-3…
- hackmd.io/@hieuPenguinnn/ojs-subscription-form-cross-journal-id…
Metrics
- CVSS 3.1
-
3.8
LOW
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N - CVSS 4.0
-
5.1
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 23 · as of 10 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.