Medium 5.3Published Jan 7, 2021

CVE-2018-18688The 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)

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It affects code-industry master_pdf_editor and 12 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for code-industry master_pdf_editor 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, an Incremental Saving vulnerability exists in multiple products. When an attacker uses the Incremental Saving feature to add pages or annotations, Body Updates are displayed to the user without any action 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 LibreOffice, Master PDF Editor, Nitro Pro, Nitro Reader, Nuance Power PDF Standard, PDF Editor 6 Pro, PDFelement6 Pro, PDF Studio Viewer 2018, PDF Studio Pro, Perfect PDF 10 Premium, and Perfect PDF Reader.

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

code-industry master_pdf_editor code-industry:master_pdf_editor	5.1.12; 5.1.68; 5.1.12; 5.1.68; 5.1.24; 5.1.68	NVD
foxitsoftware foxit_reader foxitsoftware:foxit_reader	9.4; 9.1.0; 9.2.0; 9.1.0; 9.2.0	NVD
foxitsoftware phantompdf foxitsoftware:phantompdf	from 9.0 before 9.4; 8.3.9	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
libreoffice libreoffice libreoffice:libreoffice	6.0.6.2; 6.1.3.2; 6.0.6.2; 6.1.3.2; 6.1.0.3; 6.1.3.2	NVD
nuance power_pdf_standard nuance:power_pdf_standard	3.0.0.17; 3.0.0.30; 7.0	NVD
qoppa pdf_studio qoppa:pdf_studio	12.0.7; 12.0.7; 12.0.7	NVD
1–10 of 13

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.