CVE-2025-3977Public exploitNetwork attack vector

Attachment disclosure via unchecked download ID

Published Apr 27, 2025 · Updated Apr 28, 2025

Improper authorization in Dreamer CMS 4.1.0 through 4.1.3 allows remote authenticated users to download unauthorized attachments. The /admin/attachment/download handler uses an attacker-controlled ID to select an attachment without enforcing object-level access. A low-privilege account is required; the documented impact is unauthorized file disclosure, with no integrity or service interruption.

CVSS severity5.3
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Dreamer CMS 4.1.0 through 4.1.3 allows remote authenticated users to download unauthorized attachments. The /admin/attachment/download handler uses an attacker-controlled ID to select an attachment without enforcing object-level access. A low-privilege account is required; the documented impact is unauthorized file disclosure, with no integrity or service interruption.

The record

CVE
CVE-2025-3977
Published
Apr 27, 2025
Updated
Apr 28, 2025
Vendor
Dreamer CMS Project
Product
Dreamer CMS
Classifications
CWE-285, CWE-266, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2025Record 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=4.1.0
  2. Affected versionversion=4.1.1
  3. Affected versionversion=4.1.2
  4. Affected versionversion=4.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dreamer CMS Project · Dreamer CMSversion=4.1.0; version=4.1.1; version=4.1.2; version=4.1.3

Published CVSS scores

4.3VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
4.0VulDBAV:N/AC:L/Au:S/C:P/I:N/A:N
4.3VulDBCVSS:3.1/AV:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-285Improper Authorization
CWE-266Incorrect Privilege Assignment
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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