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CVE-2020-35931

HIGH
7.8
CVSS Score
Published: December 31, 2020 at 08:14 PM UTC
Updated: June 17, 2026 at 03:14 AM UTC
2 products affected across 1 vendorPhantomPDFFoxit Reader· also runs on 2 platforms

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Severity
HIGH7.8
Exploit prediction
EPSS 2%

Description

An issue was discovered in Foxit Reader before 10.1.1 (and before 4.1.1 on macOS) and PhantomPDF before 9.7.5 and 10.x before 10.1.1 (and before 4.1.1 on macOS). An attacker can spoof a certified PDF document via an Evil Annotation Attack because the products fail to consider a null value for a Subtype entry of the Annotation dictionary, in an incremental update.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Foxit Reader· Foxitsoftware
95%
v < 10.1.1v < 4.1.1
Affected range stops below 10.1.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.1, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · microsoft-windows (environment)
PhantomPDF· Foxitsoftware
95%
v < 4.1.1v < 9.7.510.0.0 ≤ v < 10.1.1
Affected range stops below 10.1.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.7.5, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://www.foxitsoftware.com/support/security-bulletins.html

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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