CVE-2025-68616

Summary

WeasyPrint helps web developers to create PDF documents. Prior to version 68.0, a server-side request forgery (SSRF) protection bypass exists in WeasyPrint's default_url_fetcher. The vulnerability allows attackers to access internal network resources (such as localhost services or cloud metadata endpoints) even when a developer has implemented a custom url_fetcher to block such access. This occurs because the underlying urllib library follows HTTP redirects automatically without re-validating the new destination against the developer's security policy. Version 68.0 contains a patch for the issue.

Affected Software

Weaknesses

• CWE-601: CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
• CWE-918: CWE-918: Server-Side Request Forgery (SSRF)

ADP Enrichment

CISA ADP Vulnrichment

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

Additional References

• https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-983w-rhvv-gwmv

WeasyPrint: WeasyPrint Server-Side Request Forgery (SSRF)

Additional References

• https://access.redhat.com/security/cve/CVE-2025-68616
• https://bugzilla.redhat.com/show_bug.cgi?id=2430858
• https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68616.json

References

• https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-983w-rhvv-gwmv
• https://github.com/Kozea/WeasyPrint/commit/b6a14f0f3f4ce9c0c75c1a2d73cb1c5d43f0e565

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