CVE-2023-27167Public exploitNetwork attack vector

Authenticated database disclosure via unescaped absence-filter values

Published Mar 29, 2023 · Updated Jul 9, 2026

SQL injection in Suprema BioStar 2 2.8.16 allows remote authenticated users to read database contents through crafted absence queries. The /api/users/absence handler incorporates Query.conditions values into a database predicate without neutralizing SQL operators. A valid BioStar session is required, and demonstrated boolean- and time-based probes enumerate the BioStar and information-schema databases.

CVSS severity6.5
Medium
EPSS probability7.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Suprema BioStar 2 2.8.16 allows remote authenticated users to read database contents through crafted absence queries. The /api/users/absence handler incorporates Query.conditions values into a database predicate without neutralizing SQL operators. A valid BioStar session is required, and demonstrated boolean- and time-based probes enumerate the BioStar and information-schema databases.

The record

CVE
CVE-2023-27167
Published
Mar 29, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.5CISA-ADPCVSS: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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