CVE-2025-3977: iteachyou Dreamer CMS Attachment download improper authorization

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-27 · updated 2026-06-17
Weakness: CWE-266

Description

A vulnerability was found in iteachyou Dreamer CMS up to 4.1.3. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /admin/attachment/download of the component Attachment Handler. The manipulation of the argument ID leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

Dreamer CMS: through 4.1.3

References

https://gitee.com/iteachyou/dreamer_cms/issues/IC13O1
https://vuldb.com/?ctiid.306313
https://vuldb.com/?id.306313
https://vuldb.com/?submit.557639
https://gitee.com/iteachyou/dreamer_cms/issues/IC13O1

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