GHSA-VH22-6C6H-RM8Q

Vulnerability from github – Published: 2025-01-13 16:57 – Updated: 2025-01-13 21:49
VLAI?
Summary
jte's HTML templates containing Javascript template strings are subject to XSS
Details

Summary

Jte HTML templates with script tags or script attributes that include a Javascript template string (backticks) are subject to XSS.

Details

The javaScriptBlock and javaScriptAttribute methods in the Escape class (source) do not escape backticks, which are used for Javascript template strings. Dollar signs in template strings should also be escaped as well to prevent undesired interpolation.

PoC

  1. Use the Jte Gradle Plugin with the following code in src/jte/xss.jte: html @param String someMessage <!DOCTYPE html> <html lang="en"> <head> <title>XSS Test</title> <script>window.someVariable = `${someMessage}`;</script> </head> <body> <h1>XSS Test</h1> </body> </html>
  2. Use the following Java code to demonstrate the XSS vulnerability: java final StringOutput output = new StringOutput(); JtexssGenerated.render(new OwaspHtmlTemplateOutput(output), null, "` + alert(`xss`) + `"); renderHtml(output);

Impact

HTML templates rendered by Jte's OwaspHtmlTemplateOutput in versions less than or equal to 3.1.15 with script tags or script attributes that contain Javascript template strings (backticks) are vulnerable.

Severity ?
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.15"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "gg.jte:jte"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.15"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "gg.jte:jte-runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-23026"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-150",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-01-13T16:57:59Z",
    "nvd_published_at": "2025-01-13T20:15:30Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nJte HTML templates with `script` tags or script attributes that include a Javascript template string (backticks) are subject to XSS.\n\n### Details\nThe `javaScriptBlock` and `javaScriptAttribute` methods in the `Escape` class ([source](https://github.com/casid/jte/blob/main/jte-runtime/src/main/java/gg/jte/html/escape/Escape.java#L43-L83)) do not escape backticks, which are used for Javascript [template strings](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#description). Dollar signs in template strings should also be escaped as well to prevent undesired interpolation.\n\n### PoC\n1. Use the [Jte Gradle Plugin](https://jte.gg/gradle-plugin/) with the following code in `src/jte/xss.jte`:\n    ```html\n    @param String someMessage\n    \u003c!DOCTYPE html\u003e\n    \u003chtml lang=\"en\"\u003e\n    \u003chead\u003e\n        \u003ctitle\u003eXSS Test\u003c/title\u003e\n        \u003cscript\u003ewindow.someVariable = `${someMessage}`;\u003c/script\u003e\n    \u003c/head\u003e\n    \u003cbody\u003e\n    \u003ch1\u003eXSS Test\u003c/h1\u003e\n    \u003c/body\u003e\n    \u003c/html\u003e\n    ```\n2. Use the following Java code to demonstrate the XSS vulnerability:\n    ```java\n    final StringOutput output = new StringOutput();\n    JtexssGenerated.render(new OwaspHtmlTemplateOutput(output), null, \"` + alert(`xss`) + `\");\n    renderHtml(output);\n    ```\n\n### Impact\nHTML templates rendered by Jte\u0027s `OwaspHtmlTemplateOutput` in versions less than or equal to `3.1.15` with `script` tags or script attributes that contain Javascript template strings (backticks) are vulnerable.",
  "id": "GHSA-vh22-6c6h-rm8q",
  "modified": "2025-01-13T21:49:25Z",
  "published": "2025-01-13T16:57:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/casid/jte/security/advisories/GHSA-vh22-6c6h-rm8q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23026"
    },
    {
      "type": "WEB",
      "url": "https://github.com/casid/jte/commit/a6fb00d53c7b8dbb86de933215dbe1b9191a57f1"
    },
    {
      "type": "WEB",
      "url": "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#description"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/casid/jte"
    },
    {
      "type": "WEB",
      "url": "https://github.com/casid/jte/blob/main/jte-runtime/src/main/java/gg/jte/html/escape/Escape.java#L43-L83"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "jte\u0027s HTML templates containing Javascript template strings are subject to XSS"
}


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