CVE-2021-24360Public exploitNetwork attack vector

Authenticated database disclosure via unsanitized shortcode parameter

Published Jun 14, 2021 · Updated Aug 3, 2024

Blind SQL injection in KOHSEI WORKS Yes/No Chart before 1.0.12 allows remote authenticated users to infer database data via a shortcode. The shortcode handler inserts the unsanitized sid attribute into a SQL statement, while two distinct error responses expose a Boolean oracle. Contributor-level access and an existing question set with a question are required; the demonstrated consequence is blind database disclosure rather than direct query output.

CVSS severity6.5
Medium
EPSS probability1.16%
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 KOHSEI WORKS Yes/No Chart before 1.0.12 allows remote authenticated users to infer database data via a shortcode. The shortcode handler inserts the unsanitized sid attribute into a SQL statement, while two distinct error responses expose a Boolean oracle. Contributor-level access and an existing question set with a question are required; the demonstrated consequence is blind database disclosure rather than direct query output.

The record

CVE
CVE-2021-24360
Published
Jun 14, 2021
Updated
Aug 3, 2024
Vendor
KOHSEI WORKS
Product
Yes/No Chart
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.12 <1.0.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KOHSEI WORKS · Yes/No Chartversion=1.0.12 <1.0.12

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 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 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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