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CVE-2023-22489— Flarum 安全漏洞

一分钟漏洞结论

影响对象
flarum framework
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。

Flarum是Flarum社区的一套开源的论坛系统。 Flarum v1.6.3之前版本存在安全漏洞，该漏洞源于会打开不受控制的垃圾邮件或无意回复的讨论。

CVSS 3.5 · Low EPSS 0.56% · P44
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一、 漏洞 CVE-2023-22489 基础信息

漏洞信息
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Vulnerability Title
Flarum is missing authorization in discussion replies
来源: CVE Program / CVE List V5
Vulnerability Description
Flarum is a discussion platform for websites. If the first post of a discussion is permanently deleted but the discussion stays visible, any actor who can view the discussion is able to create a new reply via the REST API, no matter the reply permission or lock status. This includes users that don't have a validated email. Guests cannot successfully create a reply because the API will fail with a 500 error when the user ID 0 is inserted into the database. This happens because when the first post of a discussion is permanently deleted, the `first_post_id` attribute of the discussion becomes `null` which causes access control to be skipped for all new replies. Flarum automatically makes discussions with zero comments invisible so an additional condition for this vulnerability is that the discussion must have at least one approved reply so that `discussions.comment_count` is still above zero after the post deletion. This can open the discussion to uncontrolled spam or just unintentional replies if users still had their tab open before the vulnerable discussion was locked and then post a reply when they shouldn't be able to. In combination with the email notification settings, this could also be used as a way to send unsolicited emails. Versions between `v1.3.0` and `v1.6.3` are impacted. The vulnerability has been fixed and published as flarum/core v1.6.3. All communities running Flarum should upgrade as soon as possible. There are no known workarounds.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
来源: CVE Program / CVE List V5
Vulnerability Title
Flarum 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Flarum是Flarum社区的一套开源的论坛系统。 Flarum v1.6.3之前版本存在安全漏洞，该漏洞源于会打开不受控制的垃圾邮件或无意回复的讨论。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
flarum framework >= 1.3.0, < 1.6.3 -

二、漏洞 CVE-2023-22489 的公开POC

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三、漏洞 CVE-2023-22489 的情报信息

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CVE-2023-22489 补丁与修复 (1)

CVE-2023-22489 厂商安全公告 (1)

CVE-2023-22489 其他参考 (1)

IV. Related Vulnerabilities

Same product: framework
Same vendor: flarum
Same weakness: CWE-862

V. Comments for CVE-2023-22489

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