CVE-2025-35939

MEDIUM CISA KEV EPSS 62.1%
Published May 7, 20251y ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Medium
Find Similar
Published May 7, 2025 1y ago
Last Modified Jun 17, 2026 2w ago
KEV Listed Jun 2, 2025 1y ago
KEV Due Jun 23, 2025 375d overdue

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.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

CISA Known Exploited Overdue 375d
Added
Jun 2, 2025
Due
Jun 23, 2025

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS Exploit Probability
62.1% percentile
Exploit & Patch Status
Actively Exploited (KEV)
Patch Available

Weaknesses 1

CWE-472

Affected Products 2

VendorProductVersionRange
craftcmscraft_cms* <4.15.3
craftcmscraft_cms*≥5.0.0  –  <5.7.5

References 6

  • github.com https://github.com/craftcms/cms/pull/17220
    Patch
  • github.com https://github.com/craftcms/cms/releases/tag/4.15.3
    Release Notes
  • github.com https://github.com/craftcms/cms/releases/tag/5.7.5
    Release Notes
  • raw.githubusercontent.com https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-147-01.json
    Third Party Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-35939
    US Government Resource
  • cve.org https://www.cve.org/CVERecord?id=CVE-2025-35939
    VDB Entry

Remediation

  • github.com https://github.com/craftcms/cms/pull/17220
    Patch