CVE-2026-33437
Stored XSS in Stirling-PDF Get Info allows execution of attacker JS from PDF metadata.
Is CVE-2026-33437 being exploited?
Not confirmed. CVE-2026-33437 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.28% probability of exploitation in the next 30 days.
How severe is CVE-2026-33437?
CVE-2026-33437 is rated High. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33437?
Yes. A fix has been recorded for CVE-2026-33437. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33437 affect?
CVE-2026-33437 affects Stirling-PDF <2.0.0, Self-hosted Stirling-PDF web instances, Get Info workflow (get-info-on-pdf.html). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33437?
Upgrade to Stirling-PDF v2.0.0; block or sanitize untrusted PDF metadata and restrict uploads.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Stored XSS via PDF Title/Author metadata; attacker-controlled JS can steal session data, perform actions as user, or modify page content when Get Info is clicked.
Immediate action required
- affected< 2.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.