CVE-2026-85387— Concrete CMS 9.5.4前OAuth权限失效漏洞
一分钟漏洞结论
影响对象
Concrete CMS Concrete CMS
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Concrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to. The resource server's authorization validator confirmed only that a token existed, had not e
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一、 漏洞 CVE-2026-85387 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Concrete CMS before 9.5.4 allows a deactivated user to retain OAuth-authenticated REST API access
来源: CVE Program / CVE List V5
Vulnerability Description
Concrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to. The resource server's authorization validator confirmed only that a token existed, had not expired, and had not been explicitly revoked, and deactivating a user did not revoke that user's outstanding tokens. As a result, a deactivated user retained full access to /ccm/api/1.0/* for the remaining lifetime of any token already issued to them. The same gap applied to accounts that had been deleted or locked pending a forced password reset. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Myq Larson for reporting.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Concrete CMS | Concrete CMS | 5.0.0 ~ 9.5.3 | - |
|
二、漏洞 CVE-2026-85387 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-85387 其他参考 (1)
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Page Not Found :: Concrete CMS release-notes
同批安全公告 · Concrete CMS · 2026-09-16 · 共 6 条
| CVE-2026-85385 | 7.7 HIGH | Concrete CMS 9.5.4 前用户时区存储型XSS漏洞 |
| CVE-2026-85386 | 7.3 HIGH | Concrete CMS 9.5.4 前跨站脚本漏洞 |
| CVE-2026-18120 | 6.3 MEDIUM | Express遗留入口搜索端点授权缺失漏洞 |
| CVE-2026-87028 | 5.3 MEDIUM | Concrete CMS 9.5.3 跨板IDOR信息泄露漏洞 |
| CVE-2026-87031 | 2.1 LOW | Concrete CMS 9.5.3 用户创建API缺失授权漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-85387
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