CVE-2025-55161

Stirling-PDF is a locally hosted web application that performs various operations on PDF files. Prior to version 1.1.0, when using the /api/v1/convert/markdown/pdf endpoint to convert Markdown to PDF, the backend calls a third-party tool to process it and includes a sanitizer for security sanitization which can be bypassed and result in SSRF. This issue has been patched in version 1.1.0.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1

8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

EPSS

1.98% chance of exploitation in the next 30 days, 79th percentile

Nuclei

high · CWE-918

Published

2025-08-11

Updated

2025-08-12

Proof-of-concept exploits (1)

• Stirling-Tools/Stirling-PDF/security/advisories/GHSA-ff33-grr6-rmvp

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-55161.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2025-55160
• CVE-2025-55162
• CVE-2025-5516
• CVE-2025-55166
• CVE-2025-55156
• CVE-2025-55167