Vulnerability from drupal
Published
2026-02-25 18:44
Modified
2026-02-25 18:44
Summary
Details

This module allows site builders to create so-called "theme_rule" config entities. These theme rules can render pages with different themes than the default when certain conditions match.

The module uses simple GET request to disable or enable theme rules, which allows attackers to disable or enable theme rules by tricking site administrators to click on links.

This vulnerability is mitigated by the fact that an attacker must know the machine name of the theme rule.

Credits
Juraj Nemec (poker10) www.drupal.org/u/poker10

{
  "affected": [
    {
      "database_specific": {
        "affected_versions": "\u003c1.2.1"
      },
      "package": {
        "ecosystem": "Packagist:https://packages.drupal.org/8",
        "name": "drupal/theme_rule"
      },
      "ranges": [
        {
          "database_specific": {
            "constraint": "\u003c1.2.1"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": []
    }
  ],
  "aliases": [
    "CVE-2026-3211"
  ],
  "credits": [
    {
      "contact": [
        "https://www.drupal.org/u/poker10"
      ],
      "name": "Juraj Nemec (poker10)"
    }
  ],
  "details": "This module allows site builders to create so-called \"theme\\_rule\" config entities. These theme rules can render pages with different themes than the default when certain conditions match.\n\nThe module uses simple GET request to disable or enable theme rules, which allows attackers to disable or enable theme rules by tricking site administrators to click on links.\n\nThis vulnerability is mitigated by the fact that an attacker must know the machine name of the theme rule.",
  "id": "DRUPAL-CONTRIB-2026-012",
  "modified": "2026-02-25T18:44:38.000Z",
  "published": "2026-02-25T18:44:38.000Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-012"
    }
  ],
  "schema_version": "1.7.0"
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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