CVE-2023-43900Public exploitNetwork attack vector

Authenticated document disclosure via unchecked object identifiers

Published Nov 14, 2023 · Updated Aug 28, 2026

IDOR in EMSigner 2.8.7 allows remote authenticated users to download other users' documents by manipulating object identifiers. The GETALLDOCUMENTSWORKDETAILSShareDownload endpoint exposes sequential DocumentID values and EncryptedDocumentId tokens, and InternalUserCompletedDownload returns documents without checking ownership. A low-privilege account can enumerate identifiers and read documents belonging to other profiles; no integrity or availability impact is reported.

CVSS severity6.5
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in EMSigner 2.8.7 allows remote authenticated users to download other users' documents by manipulating object identifiers. The GETALLDOCUMENTSWORKDETAILSShareDownload endpoint exposes sequential DocumentID values and EncryptedDocumentId tokens, and InternalUserCompletedDownload returns documents without checking ownership. A low-privilege account can enumerate identifiers and read documents belonging to other profiles; no integrity or availability impact is reported.

The record

CVE
CVE-2023-43900
Published
Nov 14, 2023
Updated
Aug 28, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

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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