CVE-2025-28103Public exploitNetwork attack vector

Account deletion via case-insensitive username collision

Published Apr 21, 2025 · Updated May 12, 2025

Missing authorization in DogukanUrker FlaskBlog 2.6.1 allows remote authenticated users to delete arbitrary user accounts. The deletion path lowercases the requesting account name and matches it against lower(userName), collapsing case-distinct names such as admiN and admin. Any registered account can exploit this collision to delete another case-equivalent account, including the administrator account.

CVSS severity6.4
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in DogukanUrker FlaskBlog 2.6.1 allows remote authenticated users to delete arbitrary user accounts. The deletion path lowercases the requesting account name and matches it against lower(userName), collapsing case-distinct names such as admiN and admin. Any registered account can exploit this collision to delete another case-equivalent account, including the administrator account.

The record

CVE
CVE-2025-28103
Published
Apr 21, 2025
Updated
May 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1531
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 21, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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?

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

6.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1531Account Access Removal

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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