CVE-2026-111609

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.

CVSS 4.0

5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

3.8CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-25)

CWE

CWE-639

Published

2026-10-16

Modified

2026-10-21

Record from

the NVD, synced 2026-10-21

References

• https://github.com/pkp/ojs/blob/3_5_0-5/controllers/grid/subscriptions/IndividualSubscriptionForm.php#L47-L51
• https://github.com/pkp/ojs/blob/3_5_0-5/controllers/grid/subscriptions/InstitutionalSubscriptionForm.php#L57-L62
• https://hackmd.io/@hieuPenguinnn/ojs-subscription-form-cross-journal-idor
• https://www.vulncheck.com/advisories/pkp-open-journal-systems-through-3.5.0-5-cross-journal-subscription-idor-via-updatesubscription
• https://hackmd.io/@hieuPenguinnn/ojs-subscription-form-cross-journal-idor

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