GHSA-8w54-22w9-3g8f: Products.CMFPlone Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8w54-22w9-3g8f",
  "modified" : "2022-01-31T20:25:54Z",
  "published" : "2022-01-28T23:10:40Z",
  "aliases" : [ ],
  "summary" : "Cross-site Scripting and Open Redirect in Products.CMFPlone",
  "details" : "### Impact\nPlone is vulnerable to reflected cross site scripting and open redirect when an attacker can get a compromised version of the image_view_fullscreen page in a cache, for example in Varnish.\nThe technique is known as cache poisoning.\nAny later visitor can get redirected when clicking on a link on this page.\nUsually only anonymous users are affected, but this depends on your cache settings.\n\n### Patches\nNo patch is available for the Products.CMFPlone 4 series.\nVersions 5.0 and higher are not affected, but two other packages used by these versions are affected.\n\n`plone.app.contenttypes` has the same problem in all versions, see [advisory](https://github.com/plone/plone.app.contenttypes/security/advisories/GHSA-f7qw-5fgj-247x).\nIn Plone 5.0-5.2, the default Products.ATContentTypes version has the same problem. See [advisory](https://github.com/plone/Products.ATContentTypes/security/advisories/GHSA-g4c2-ghfg-g5rh).\nPlone 5.2.7 and 6.0.0a3 will be released today and will include these fixes.\n\nFor all unpatched versions of the three packages, you can use the following workaround.\n\n### Workaround\nMake sure the image_view_fullscreen page is not stored in the cache.\nIn Plone:\n\n* Login as Manager and go to Site Setup.\n* Go to the 'Caching' control panel. If this does not exist, or 'Enable caching' is not checked, you should normally not be vulnerable.\n* Click on the tab 'Caching operations'.\n* Under 'Legacy template mappings' locate the ruleset 'Content item view'.\n* From the last column ('Templates')  remove 'image_view_fullscreen'.\n* Click on Save.\n\n### Reporter\nThis vulnerability was responsibly disclosed to the Plone Security Team by Gustav Hansen, F-Secure Consulting. Thank you!\n\n### For more information\nIf you have any questions or comments about this advisory, email us at [security@plone.org](mailto:security@plone.org)\nThis is also the correct address to use when you want to report a possible vulnerability.\nSee [our security report policy](https://plone.org/security/report).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Products.CMFPlone"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/plone/Products.CMFPlone/security/advisories/GHSA-8w54-22w9-3g8f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/plone/Products.CMFPlone"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-28T21:56:53Z",
    "nvd_published_at" : null
  }
}