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CVE-2025-35939— Craft CMS stores user-provided content in session files

Quick assessment

Affected
Craft CMS
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Craft CMS是Craft CMS开源的一套内容管理系统（CMS）。 Craft CMS 5.7.5之前版本存在安全漏洞，该漏洞源于未清理会话文件内容，可能导致任意代码执行。

CVSS 5.3 · Medium KEV EPSS 1.35% · P71
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I. Basic Information for CVE-2025-35939

Vulnerability Information
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Vulnerability Title
Craft CMS stores user-provided content in session files
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对假设不可变Web参数的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Craft CMS是Craft CMS开源的一套内容管理系统（CMS）。 Craft CMS 5.7.5之前版本存在安全漏洞，该漏洞源于未清理会话文件内容，可能导致任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Craft CMS 0 ~ 5.7.5 -

II. Public POCs for CVE-2025-35939

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III. Intelligence Information for CVE-2025-35939

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Vendor Advisories for CVE-2025-35939 (1)

IV. Related Vulnerabilities

Same product: CMS
Same vendor: Craft
Same weakness: CWE-472

V. Comments for CVE-2025-35939

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