# CVE-2025-35939

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.

- Page: https://www.vulneraibility.com/cve/CVE-2025-35939
- CVSS: 5.3
- Known exploited: yes, in CISA KEV since 2025-06-02; CISA due date 2025-06-23
- EPSS: 1.35%
- CISA SSVC: exploitation active, automatable yes, technical impact partial (assessed 2025-06-06)
- Weakness: CWE-472
- Also known as: GHSA-7vrx-9684-xrf2
- Published: 2025-05-07

## Affected versions

- Craft CMS: affected < 5.7.5; < 4.15.3; fixed in 5.7.5, 4.15.3

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://github.com/craftcms/cms/pull/17220
- [other] https://github.com/craftcms/cms/releases/tag/4.15.3
- [other] https://github.com/craftcms/cms/releases/tag/5.7.5
- [other] https://www.cve.org/CVERecord?id=CVE-2025-35939
- [other] https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-147-01.json
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-35939

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.