CVE-2018-18689

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-07 · updated 2026-06-17
Weakness: CWE-347

Description

The Portable Document Format (PDF) specification does not provide any information regarding the concrete procedure of how to validate signatures. Consequently, a Signature Wrapping vulnerability exists in multiple products. An attacker can use /ByteRange and xref manipulations that are not detected by the signature-validation logic. This affects Foxit Reader before 9.4 and PhantomPDF before 8.3.9 and 9.x before 9.4. It also affects eXpert PDF 12 Ultimate, Expert PDF Reader, Nitro Pro, Nitro Reader, PDF Architect 6, PDF Editor 6 Pro, PDF Experte 9 Ultimate, PDFelement6 Pro, PDF Studio Viewer 2018, PDF Studio Pro, PDF-XChange Editor and Viewer, Perfect PDF 10 Premium, Perfect PDF Reader, Soda PDF, and Soda PDF Desktop.

Affected products

Avanquest Expert Pdf Ultimate: 12.0.20
Avanquest Pdf Experte Ultimate: 9.0.270
Foxit Reader: 9.1.0, 9.2.0.9297, 9.3.0.10826, 9.2.0
Nitro Pro: 11.0.3.173
Gonitro Nitro Reader: 5.5.9.2
Iskysoft Pdf Editor 6: 6.4.2.3521, 6.6.2.3315, 6.7.6.3399
Iskysoft Pdfelement6: 6.8.0.3523, 6.8.4.3921, 6.7.1.3355, 6.7.6.3399
PDF-XChange Editor: 7.0.237.1, 7.0.326
pdfforge PDF Architect: 6.0.37, 6.1.24.1862
Qoppa Pdf Studio: 12.0.7
Qoppa Pdf Studio Viewer 2018: 2018.0.1, 2018.2.0
Sodapdf Soda Pdf: 9.3.17
Soda PDF Desktop: 10.2.09, 10.2.16.1217
Soft-Xpansion Perfect Pdf 10: 10.0.0.1
Soft-Xpansion Perfect Pdf Reader: 13.0.3, 13.1.5
Tracker-Software Pdf-Xchange Viewer: 2.5
Visagesoft Expert Pdf Reader: 9.0.180

References

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