CVE-2018-18689

5.3 MEDIUM 4% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 3.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-01-07 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 01:47 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.6% in the next 30 days (EPSS).
Severity: 5.3 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-01-07 18:15 UTC
Last modified: 2026-06-17 01:47 UTC
Exploit probability: 3.6% · EPSS, next 30 days
Weakness: CWE-347
Record status: Modified

Affected

Avanquest Expert Pdf Ultimate 12.0.20
Avanquest Pdf Experte Ultimate 9.0.270
Foxitsoftware Foxit Reader 9.1.0
Foxitsoftware Foxit Reader 9.2.0.9297
Foxitsoftware Foxit Reader 9.3.0.10826
Gonitro Nitro Pro 11.0.3.173
Gonitro Nitro Reader 5.5.9.2
Iskysoft Pdf Editor 6 6.4.2.3521

Attack profile CVSS 3.1 · 5.3

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-18689.md and follow it. Check whether this project is affected by CVE-2018-18689. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record