VulnSocial

CVE-2025-55161Active Exploitation(stirlingpdf / stirling_pdf)

LOWCVSS 9.8 · CRITICAL

Exploitation ongoing with high activity in latest observed window (1 mentions)

Immediate actions

  • Prioritize remediation for stirlingpdf stirling_pdf systems immediately
  • Assume compromise if assets are exposed
  • Track advisory updates for patch or workaround availability

Recommended action window: Immediate (within 24h)

NVD description

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.

stirlingpdf CVEsBack to dashboard
3.5/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Weakness type (CWE)
CWE-918

Priority

LOW

Exploitation

ACTIVE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • stirling_pdf

Threat summary

  • Active exploitation appears in 1 classified signals
  • 1 mentions across 1 observed day

What's happening

  • Active exploitation reported across 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
stirlingpdf
Products
stirling_pdf

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-13: 1Active Exploitation · 2026-04-13: 104-13
Signal classification1 categories
Active Exploitation
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • CTIWatch@ctiwatchcloud
    Active Exploitation

    🚨 [HIGH] Active exploitation detected: CVE-2025-55161 Exploit in the wild confirmed for CVE-2025-55161 (CVSS null). Stirling-PDF is a locally hosted web application that performs various operations on PDF... 🔗 http://ctiwatch.cloud/alerts #ZeroDay #ExploitInWild #CyberSecurity

    Post summary

    This alert states that CVE-2025-55161 is actively exploited in the wild, with no PoC, patch, or detailed technical description provided.

    00000208
    5.6K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appstirlingpdfstirling_pdf---

Explore more

Back to dashboardstirlingpdf CVEsstirling_pdf vulnerabilities