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CVE-2026-62262 – Unauthenticated SQL Injection – Piwigo prior to 17.0.0beta1

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Summary

CVE-2026-62262 is an unauthenticated SQL injection vulnerability in Piwigo, the open-source web photo gallery application. The flaw resides in the public "filtered search" web service and allows an anonymous guest to extract database contents or induce time-based delays when the photo rating feature is enabled. The issue carries a CVSS v3.1 base score of 9.1 (Critical) because it requires no authentication or user interaction.

Technical details

  • Root cause: When building the SQL search rule for a rating filter, include/functions_search.inc.php applies intval() only to the lower bound of the rating range comparison; the upper bound is concatenated directly from the raw, attacker-supplied value, bypassing sanitization.
  • Trigger conditions: The Piwigo instance must have the rating feature enabled and allow guest access to web services (ACCESS_FREE permission on web service calls), which is a common/default configuration for public galleries.
  • Attack vector: An unauthenticated user sends a crafted ratings[] value to the pwg.images.filteredSearch.create web service method; the unvalidated value is stored in the search rule set (include/ws_functions/pwg.images.php) and later executed as part of a SQL query when the resulting search URL is opened.
  • Impact: Error-based and blind/time-based SQL injection enabling extraction of database contents (e.g., via EXTRACTVALUE-style payloads) and database-dependent delays. The vulnerability affects confidentiality and integrity; availability impact is not scored.

Affected software

  • Piwigo versions 17.0.0beta1 and earlier (all prior releases), when the rating feature is enabled and guest web service access is permitted.

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: No fixed Piwigo release was publicly confirmed at the time of writing; monitor official Piwigo release channels and apply a patched version as soon as one is published.
  • Workarounds:
    • Disable the photo rating feature if it is not required, which removes the vulnerable code path.
    • Restrict or disable guest (unauthenticated) access to Piwigo’s web services (ACCESS_FREE) where public rating/search functionality is not needed.
    • Apply least-privilege database permissions to the account Piwigo uses, limiting the impact of any successful injection.
    • Deploy a web application firewall rule to inspect and block malicious ratings[] parameter values sent to the pwg.images.filteredSearch.create endpoint.

References

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