CVE-2026-18403Public exploitNetwork attack vector

Authenticated SQL injection via unvalidated CPDB mappings

Published Aug 14, 2026 · Updated Aug 14, 2026

SQL injection in LimeSurvey Community Edition 7.0.5 allows remote authenticated users to read or alter database data through CPDB token copying. Participant.php passes attacker-controlled token field names into select() and interpolates participant identifiers into SQL conditions without validation or parameter binding. Authenticated access to the Central Participant Database workflow is required, and the consequence is limited to data reachable through the application database.

CVSS severity6.0
Medium
EPSS probability0.28%
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 LimeSurvey Community Edition 7.0.5 allows remote authenticated users to read or alter database data through CPDB token copying. Participant.php passes attacker-controlled token field names into select() and interpolates participant identifiers into SQL conditions without validation or parameter binding. Authenticated access to the Central Participant Database workflow is required, and the consequence is limited to data reachable through the application database.

The record

CVE
CVE-2026-18403
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
LimeSurvey GmbH
Product
LimeSurvey
Classifications
CWE-89, CAPEC-66, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=7.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LimeSurvey GmbH · LimeSurveyversion=7.0.5

Published CVSS scores

6.0Fluid AttacksCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA: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 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-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CAPEC-66SQL 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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