CVE-2025-35939 Details
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.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2025-35939
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
16.71 Probability of exploitation activity being observed over the next 30 days (95th percentile)
CVSS score for CVE-2025-35939
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.3 Medium
Products affected by CVE-2025-35939
Craft CMS 3.6.12
Craft CMS 3.6.12.1
Craft CMS 3.6.18
Craft CMS 3.7.13
Craft CMS 3.7.20
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2025-35939 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 1,197 49.30%
GB 289 11.90%
DE 235 9.68%
AU 191 7.87%
NL 189 7.78%
CA 88 3.62%
SG 69 2.84%
IE 40 1.65%
SE 16 0.66%
FR 16 0.66%

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CVE-2025-35939 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 2,093 89.44%
Telecommunications 135 5.77%
Education 19 0.81%
Business Services 19 0.81%
Real Estate 12 0.51%
Government/Politics 11 0.47%
Healthcare/Wellness 7 0.30%
Finance 6 0.26%
Manufacturing 5 0.21%
Tourism/Hospitality 5 0.21%

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