CVE-2020-15411Network attack vector

Unauthorized attachment disclosure via incomplete ACL checks

Published Jun 30, 2020 · Updated Aug 4, 2024

Improper access control in MISP 2.4.128 and earlier allows remote authenticated users to download restricted event attachments. The download and downloadAttachment actions read an attribute by supplied ID and applied only partial organization and distribution checks instead of the complete user-scoped attribute ACL. A valid session or export-enabled authentication key is required, and exploitation exposes attachment or malware-sample contents the account cannot otherwise access.

CVSS severity9.8
Critical
EPSS probability1.46%
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 MISP 2.4.128 and earlier allows remote authenticated users to download restricted event attachments. The download and downloadAttachment actions read an attribute by supplied ID and applied only partial organization and distribution checks instead of the complete user-scoped attribute ACL. A valid session or export-enabled authentication key is required, and exploitation exposes attachment or malware-sample contents the account cannot otherwise access.

The record

CVE
CVE-2020-15411
Published
Jun 30, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

9.8INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5INCIBE-CERTAV:N/AC:L/Au:N/C:P/I:P/A:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

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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