CVE-2023-47323Public exploitNetwork attack vector

Unauthenticated message disclosure via unchecked ownership

Published Dec 13, 2023 · Updated Jul 9, 2026

Broken access control in Silverpeas Core 6.3.1 allows remote attackers to read other users' messages by changing a message ID. The ReadMessage endpoint passes the requested ID to message retrieval without verifying that the current user owns the corresponding received or sent notification. Sequential identifiers expose messages belonging to ordinary users and administrators without authentication or user interaction.

CVSS severity7.5
High
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in Silverpeas Core 6.3.1 allows remote attackers to read other users' messages by changing a message ID. The ReadMessage endpoint passes the requested ID to message retrieval without verifying that the current user owns the corresponding received or sent notification. Sequential identifiers expose messages belonging to ordinary users and administrators without authentication or user interaction.

The record

CVE
CVE-2023-47323
Published
Dec 13, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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