CVE-2025-359395.3MediumCWE-472

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

Craft · CMS

Vendor fix available · Affected: Craft CMS · Exploitation: in CISA KEV since 2 Jun 2025

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

ExploitationIn CISA KEV

In CISA KEVCISA KEV catalogue2 Jun 2025
Exploited (reported): not seen
Scanning observed: not seen
Proof of concept public: not seen
Not established: not seen

1.4%probability of exploitation in the next 30 days

72nd percentile

050100

Higher than 72% of scored CVEs

5.3MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Craft · CMSbefore 5.7.5; before 4.15.3

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalogue.
CISA KEV: Listed since 2 Jun 2025 · catalogue entry
Public check: No public nuclei template
Weakness: External Control of Assumed-Immutable Web Parameter · Input Validation and Logic
Vendor: Craft
Published: May 2025
Band: Exploited in the wild, May 2025

What changed

2 Jun 2025
CISA added it to the KEV catalogue CISA

CoverageNo articles yet

No CyberSIXT article names CVE-2025-35939 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.