Medium 5.3Published Jan 7, 2021

CVE-2018-18689The Portable Document Format (PDF) specification does not provide any information regarding the concrete procedure of how to validate signatures.

Updated under an hour ago (Nov 2, 2026, 3:00 AM ET)

Does this affect you?

It affects avanquest expert_pdf_ultimate and 16 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stackFree account, 3 products Every CVE for avanquest expert_pdf_ultimate Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-347
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

avanquest expert_pdf_ultimate avanquest:expert_pdf_ultimate	12.0.20	NVD
avanquest pdf_experte_ultimate avanquest:pdf_experte_ultimate	9.0.270	NVD
foxitsoftware foxit_reader foxitsoftware:foxit_reader	9.1.0; 9.2.0.9297; 9.3.0.10826; 9.1.0; 9.2.0; 9.1.0; 9.2.0	NVD
gonitro nitro_pro gonitro:nitro_pro	11.0.3.173	NVD
gonitro nitro_reader gonitro:nitro_reader	5.5.9.2	NVD
iskysoft pdf_editor_6 iskysoft:pdf_editor_6	6.4.2.3521; 6.6.2.3315; 6.7.6.3399	NVD
iskysoft pdfelement6 iskysoft:pdfelement6	6.8.0.3523; 6.8.4.3921; 6.7.1.3355; 6.7.6.3399	NVD
pdf-xchange pdf-xchange_editor pdf-xchange:pdf-xchange_editor	7.0.237.1; 7.0.326	NVD
pdfforge pdf_architect pdfforge:pdf_architect	6.0.37; 6.1.24.1862	NVD
qoppa pdf_studio qoppa:pdf_studio	12.0.7; 12.0.7; 12.0.7	NVD
1–10 of 17

References

References

https://pdf-insecurity.org/signature/evaluation_2018.html	third-party-advisory
https://pdf-insecurity.org/signature/signature.html	third-party-advisory
https://www.foxitsoftware.com/support/security-bulletins.php	vendor-advisory
https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.