CVE-2025-35939

Summary

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 Software

VendorProductVersion RangeStatus
CraftCMS0 < 5.7.5affected
CraftCMS5.7.5unaffected
CraftCMS0 < 4.15.3affected
CraftCMS4.15.3unaffected

Weaknesses

  • CWE-472: CWE-472 External Control of Assumed-Immutable Web Parameter

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: active
    • Automatable: yes
    • Technical Impact: partial

Additional References

References