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CVE-2026-111609— PKP Open Journal Systems through 3.5.0-5 Cross-Journal Subscription IDOR via updateSubscription

Quick assessment

Affected
PKP Open Journal Systems
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PKP Open Journal Systems 3.5.0-5 及更早版本存在不安全的直接对象引用漏洞，该漏洞允许期刊管理员或订阅管理员通过提供任意订阅 ID，访问其他期刊的订阅数据。攻击者可通过 功能枚举连续的 ID 以查看订阅者详细信息，并利用 将订阅重新分配至其自身管理的期刊，从而撤销受害者的访问权限。

CVSS 3.8 · Low EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1201 · Password Policy Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
PKP Open Journal Systems ≤ 3.5.0-5 affected
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I. Basic Information for CVE-2026-111609

Vulnerability Information
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Vulnerability Title
PKP Open Journal Systems through 3.5.0-5 Cross-Journal Subscription IDOR via updateSubscription
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
PKP Open Journal Systems 0 ~ 3.5.0-5 -

II. Public POCs for CVE-2026-111609

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

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III. Intelligence Information for CVE-2026-111609

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Vendor Advisories for CVE-2026-111609 (1)

Proof of Concept for CVE-2026-111609 (1)

Security Blog Posts for CVE-2026-111609 (1)

Other References for CVE-2026-111609 (1)

IV. Related Vulnerabilities

Same product: Open Journal Systems
Same vendor: PKP
Same weakness: CWE-639