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CVE-2026-59533 Christoph Vielgrader CVE debrief

CVE-2026-59533 is a critical Unauthenticated SQL Injection vulnerability in the Relevanssi Light plugin versions <= 1.2.2. The CVE record was published on 2026-07-27T15:17:03.817Z and has not been modified since then. The NVD entry is currently Deferred. This vulnerability allows attackers to inject malicious SQL code without authentication, potentially leading to data breaches or system compromise. Administrators and users of the Relevanssi Light plugin versions <= 1.2.2 should prioritize patching this vulnerability to prevent potential SQL injection attacks. The CVSS score is 9.3, indicating a high severity. Further investigation and inventory checks are recommended to determine the vulnerability's relevance and potential impact.

Vendor
Christoph Vielgrader
Product
Relevanssi Light
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-07-27
Advisory published
2026-07-27
Advisory updated
2026-07-27

Who should care

Administrators and users of the Relevanssi Light plugin versions <= 1.2.2 should prioritize patching this vulnerability to prevent potential SQL injection attacks. This includes reviewing and updating database credentials and access controls, monitoring for suspicious SQL queries and database activity, and considering implementing a web application firewall (WAF) to detect and prevent SQL injection attacks.

Technical summary

The vulnerability is a critical Unauthenticated SQL Injection issue in the Relevanssi Light plugin. The CVSS score is 9.3, indicating a high severity. The vulnerability allows attackers to inject malicious SQL code without authentication, potentially leading to data breaches or system compromise. This issue can be mitigated by patching the Relevanssi Light plugin to version > 1.2.2.

Defensive priority

High

Recommended defensive actions

  • Patch the Relevanssi Light plugin to version > 1.2.2
  • Review and update database credentials and access controls
  • Monitor for suspicious SQL queries and database activity
  • Consider implementing a web application firewall (WAF) to detect and prevent SQL injection attacks
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record and NVD details indicate a critical vulnerability in the Relevanssi Light plugin. However, the exact scope of affected systems and potential impact are not explicitly stated. Further investigation and inventory checks are recommended to determine the vulnerability's relevance and potential impact. The vulnerability allows attackers to inject malicious SQL code without authentication, potentially leading to data breaches or system compromise.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-59533 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-59533

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-59533 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-59533

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.