CVE-2023-24069Public exploit

Attachment disclosure via uncleared plaintext cache

Published Jan 23, 2023 · Updated Aug 2, 2024

Information disclosure in Signal Desktop before 6.2.0 allows local users to recover message attachments from its plaintext cache. The attachments.noindex cache retains unencrypted attachment files and fails to purge a deleted file when the attachment was previously quoted in a reply. Local filesystem access is required; Signal disputes the finding because its threat model does not protect data from adversaries with that access.

CVSS severity3.3
Low
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Signal Desktop before 6.2.0 allows local users to recover message attachments from its plaintext cache. The attachments.noindex cache retains unencrypted attachment files and fails to purge a deleted file when the attachment was previously quoted in a reply. Local filesystem access is required; Signal disputes the finding because its threat model does not protect data from adversaries with that access.

The record

CVE
CVE-2023-24069
Published
Jan 23, 2023
Updated
Aug 2, 2024
Vendor
Signal
Product
Signal Desktop
Classifications
CWE-200, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=6.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Signal · Signal Desktopversion=6.2.0

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

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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