PT-2026-33506 · Unknown · Stirling-Pdf

CVE-2026-33436 · Published 2026-04-17 · Updated 2026-05-13

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Stirling-PDF versions prior to 2.0.0

Description File upload endpoints render user-supplied filenames directly into HTML using unsafe methods such as innerHTML without sanitization. This allows an attacker to craft a file with a malicious filename containing JavaScript that executes in the browser context of the user performing the upload, leading to reflected Cross-Site Scripting (XSS), which is a technique where malicious scripts are injected into otherwise trusted websites.

Recommendations Update to version 2.0.0.

Exploit

Fix

XSS

Improper Encoding or Escaping of Output

RCE

Weakness Enumeration

CWE-79

CWE-116

CWE-20

Related Identifiers

CVE-2026-33436

GHSA-Q5J3-4M5W-WP75

Affected Products

Stirling-Pdf

References · 6

• 🔥 https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-q5j3-4m5w-wp75 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33436.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-33436 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33436 · Security Note
• https://twitter.com/CVEnew/status/2045467401085452664 · Twitter Post
• https://t.me/cveNotify/163322 · Telegram Post