CVE-2026-21875Public exploitNetwork attack vector

Database disclosure via unsanitized channel comment identifier

Published Jan 7, 2026 · Updated Jan 7, 2026

Blind SQL injection in ClipBucket V5 5.5.2-#190 and earlier allows remote attackers to read database data through channel comments. The obj_id value from /actions/ajax.php reaches user_exists(), where it is concatenated without validation into a count() query. Anonymous comments expose the flaw without authentication by default; disabling them limits exploitation to remote authenticated users.

CVSS severity9.8
Critical
EPSS probability1.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Blind SQL injection in ClipBucket V5 5.5.2-#190 and earlier allows remote attackers to read database data through channel comments. The obj_id value from /actions/ajax.php reaches user_exists(), where it is concatenated without validation into a count() query. Anonymous comments expose the flaw without authentication by default; disabling them limits exploitation to remote authenticated users.

The record

CVE
CVE-2026-21875
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
MacWarrior
Product
ClipBucket V5
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 2026Record 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=<= 5.5.2-#187

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MacWarrior · ClipBucket V5version=<= 5.5.2-#187

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

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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