CVE-2026-4947Network attack vector

Authenticated signature forgery via invitation IDOR

Published Apr 1, 2026 · Updated Apr 1, 2026

Improper access control in Foxit eSign before 2026-03-26 allows remote authenticated users to access or alter other users' signing resources. The signing invitation acceptance process trusts user-supplied object identifiers without confirming that the requester is the intended recipient. A low-privileged account can cross the invitation authorization boundary without user interaction, exposing documents and enabling forged signatures.

CVSS severity7.1
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Foxit eSign before 2026-03-26 allows remote authenticated users to access or alter other users' signing resources. The signing invitation acceptance process trusts user-supplied object identifiers without confirming that the requester is the intended recipient. A low-privileged account can cross the invitation authorization boundary without user interaction, exposing documents and enabling forged signatures.

The record

CVE
CVE-2026-4947
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
Foxit Software
Product
Foxit eSign
Classifications
CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 2026-03-26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Foxit Software · Foxit eSignversion=before 2026-03-26

Published CVSS scores

7.1FoxitCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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