GIVE YOUR AGENT THE EVIDENCE

Set up in your agent.

One prompt to get started. Paste it into your coding agent to connect cve.new through MCP and bring vulnerability context into your workflow.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

GIVE YOUR AGENT THE EVIDENCE

Investigate in your agent.

Turn this advisory into a focused investigation. Ask your agent to check your project’s versions, explain the evidence, and suggest a compatible fix.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

cve.new
GHSA-w4pj-7p68-3vgvlow3.5

Stored XSS in October

Check your stack

The advisory, in context

Impact

A user with access to a markdown FormWidget that stores data persistently could create a stored XSS attack against themselves and any other users with access to the generated HTML from the field.

Patches

Issue has been patched in Build 466 (v1.0.466) & RainLab.Blog v1.4.1 by restricting the ability to store JS in markdown to only users that have been explicitly granted the backend.allow_unsafe_markdown permission.

Workarounds

Apply https://github.com/octobercms/october/commit/9ecfb4867baae14a0d3f99f5b5c1e8a979ae8746 & https://github.com/rainlab/blog-plugin/commit/6ae19a6e16ef3ba730692bc899851342c858bb94 to your installation manually if unable to upgrade to Build 466 or v1.4.1 of RainLab.Blog (if using that plugin).

References

Reported by Sivanesh Ashok

For more information

If you have any questions or comments about this advisory:

Threat assessment:

<img width="1100" alt="Screen Shot 2020-03-31 at 2 01 52 PM" src="https://user-images.githubusercontent.com/7253840/78070158-8f7ef580-7358-11ea-950c-226533f6a0a3.png">

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Ecosystem versions

From 1.0.319 before 1.0.466

Fixed in 1.0.466

147 explicitly affected versions

v1.0.319, v1.0.320, v1.0.321, v1.0.322, v1.0.323, v1.0.324, v1.0.325, v1.0.326, v1.0.327, v1.0.328, v1.0.329, v1.0.330, v1.0.331, v1.0.332, v1.0.333, v1.0.334, v1.0.335, v1.0.336, v1.0.337, v1.0.338, v1.0.339, v1.0.340, v1.0.341, v1.0.342, v1.0.343, v1.0.344, v1.0.345, v1.0.346, v1.0.347, v1.0.348, v1.0.349, v1.0.350, v1.0.351, v1.0.352, v1.0.353, v1.0.354, v1.0.355, v1.0.356, v1.0.357, v1.0.358, v1.0.359, v1.0.360, v1.0.361, v1.0.362, v1.0.363, v1.0.364, v1.0.365, v1.0.366, v1.0.367, v1.0.368, v1.0.369, v1.0.370, v1.0.371, v1.0.372, v1.0.373, v1.0.374, v1.0.375, v1.0.376, v1.0.377, v1.0.378, v1.0.379, v1.0.380, v1.0.381, v1.0.382, v1.0.383, v1.0.384, v1.0.385, v1.0.386, v1.0.387, v1.0.388, v1.0.389, v1.0.390, v1.0.391, v1.0.392, v1.0.393, v1.0.394, v1.0.395, v1.0.396, v1.0.397, v1.0.398, v1.0.399, v1.0.400, v1.0.401, v1.0.402, v1.0.403, v1.0.404, v1.0.405, v1.0.406, v1.0.407, v1.0.408, v1.0.409, v1.0.410, v1.0.411, v1.0.412, v1.0.413, v1.0.414, v1.0.415, v1.0.416, v1.0.417, v1.0.418, v1.0.419, v1.0.420, v1.0.421, v1.0.422, v1.0.423, v1.0.424, v1.0.425, v1.0.426, v1.0.427, v1.0.428, v1.0.429, v1.0.430, v1.0.431, v1.0.432, v1.0.433, v1.0.434, v1.0.435, v1.0.436, v1.0.437, v1.0.438, v1.0.439, v1.0.440, v1.0.441, v1.0.442, v1.0.443, v1.0.444, v1.0.445, v1.0.446, v1.0.447, v1.0.448, v1.0.449, v1.0.450, v1.0.451, v1.0.452, v1.0.453, v1.0.454, v1.0.455, v1.0.456, v1.0.457, v1.0.458, v1.0.459, v1.0.460, v1.0.461, v1.0.462, v1.0.463, v1.0.464, v1.0.465

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "1.0.319"
        },
        {
          "fixed": "1.0.466"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "v1.0.319",
    "v1.0.320",
    "v1.0.321",
    "v1.0.322",
    "v1.0.323",
    "v1.0.324",
    "v1.0.325",
    "v1.0.326",
    "v1.0.327",
    "v1.0.328",
    "v1.0.329",
    "v1.0.330",
    "v1.0.331",
    "v1.0.332",
    "v1.0.333",
    "v1.0.334",
    "v1.0.335",
    "v1.0.336",
    "v1.0.337",
    "v1.0.338",
    "v1.0.339",
    "v1.0.340",
    "v1.0.341",
    "v1.0.342",
    "v1.0.343",
    "v1.0.344",
    "v1.0.345",
    "v1.0.346",
    "v1.0.347",
    "v1.0.348",
    "v1.0.349",
    "v1.0.350",
    "v1.0.351",
    "v1.0.352",
    "v1.0.353",
    "v1.0.354",
    "v1.0.355",
    "v1.0.356",
    "v1.0.357",
    "v1.0.358",
    "v1.0.359",
    "v1.0.360",
    "v1.0.361",
    "v1.0.362",
    "v1.0.363",
    "v1.0.364",
    "v1.0.365",
    "v1.0.366",
    "v1.0.367",
    "v1.0.368",
    "v1.0.369",
    "v1.0.370",
    "v1.0.371",
    "v1.0.372",
    "v1.0.373",
    "v1.0.374",
    "v1.0.375",
    "v1.0.376",
    "v1.0.377",
    "v1.0.378",
    "v1.0.379",
    "v1.0.380",
    "v1.0.381",
    "v1.0.382",
    "v1.0.383",
    "v1.0.384",
    "v1.0.385",
    "v1.0.386",
    "v1.0.387",
    "v1.0.388",
    "v1.0.389",
    "v1.0.390",
    "v1.0.391",
    "v1.0.392",
    "v1.0.393",
    "v1.0.394",
    "v1.0.395",
    "v1.0.396",
    "v1.0.397",
    "v1.0.398",
    "v1.0.399",
    "v1.0.400",
    "v1.0.401",
    "v1.0.402",
    "v1.0.403",
    "v1.0.404",
    "v1.0.405",
    "v1.0.406",
    "v1.0.407",
    "v1.0.408",
    "v1.0.409",
    "v1.0.410",
    "v1.0.411",
    "v1.0.412",
    "v1.0.413",
    "v1.0.414",
    "v1.0.415",
    "v1.0.416",
    "v1.0.417",
    "v1.0.418",
    "v1.0.419",
    "v1.0.420",
    "v1.0.421",
    "v1.0.422",
    "v1.0.423",
    "v1.0.424",
    "v1.0.425",
    "v1.0.426",
    "v1.0.427",
    "v1.0.428",
    "v1.0.429",
    "v1.0.430",
    "v1.0.431",
    "v1.0.432",
    "v1.0.433",
    "v1.0.434",
    "v1.0.435",
    "v1.0.436",
    "v1.0.437",
    "v1.0.438",
    "v1.0.439",
    "v1.0.440",
    "v1.0.441",
    "v1.0.442",
    "v1.0.443",
    "v1.0.444",
    "v1.0.445",
    "v1.0.446",
    "v1.0.447",
    "v1.0.448",
    "v1.0.449",
    "v1.0.450",
    "v1.0.451",
    "v1.0.452",
    "v1.0.453",
    "v1.0.454",
    "v1.0.455",
    "v1.0.456",
    "v1.0.457",
    "v1.0.458",
    "v1.0.459",
    "v1.0.460",
    "v1.0.461",
    "v1.0.462",
    "v1.0.463",
    "v1.0.464",
    "v1.0.465"
  ]
}

References