ghsa-c78w-2gw7-gjv3
Vulnerability from github
Impact
A cross-site scripting (XSS) vulnerability was discovered in: the core parser and media plugin. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor via the clipboard or APIs. This impacts all users who are using TinyMCE 4.9.9 or lower and TinyMCE 5.2.1 or lower.
Patches
This vulnerability has been patched in TinyMCE 4.9.10 and 5.2.2 by improved HTML parsing and sanitization logic.
Workarounds
The workarounds available are: - disable the media plugin and manually sanitize CDATA content (see below) or - upgrade to either TinyMCE 4.9.10 or TinyMCE 5.2.2
Example: Manually strip CDATA elements
js
setup: function(editor) {
editor.on('PreInit', function() {
editor.parser.addNodeFilter('#cdata', function(nodes) {
for (var i = 0; i < nodes.length; i++) {
nodes[i].remove();
}
});
});
}
Acknowledgements
Tiny Technologies would like to thank Michał Bentkowski and intivesec for discovering these vulnerabilities.
References
https://www.tiny.cloud/docs/release-notes/release-notes522/#securityfixes
For more information
If you have any questions or comments about this advisory: * Open an issue in the TinyMCE repo * Email us at infosec@tiny.cloud
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.9.10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.2.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-1010091"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2020-05-11T20:00:00Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Impact\nA cross-site scripting (XSS) vulnerability was discovered in: the core parser and `media` plugin. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor via the clipboard or APIs. This impacts all users who are using TinyMCE 4.9.9 or lower and TinyMCE 5.2.1 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 4.9.10 and 5.2.2 by improved HTML parsing and sanitization logic.\n\n### Workarounds\nThe workarounds available are:\n- disable the media plugin and manually sanitize CDATA content (see below)\nor\n- upgrade to either TinyMCE 4.9.10 or TinyMCE 5.2.2\n\n#### Example: Manually strip CDATA elements\n```js\nsetup: function(editor) {\n editor.on(\u0027PreInit\u0027, function() {\n editor.parser.addNodeFilter(\u0027#cdata\u0027, function(nodes) {\n for (var i = 0; i \u003c nodes.length; i++) {\n nodes[i].remove();\n }\n });\n });\n}\n```\n\n### Acknowledgements\nTiny Technologies would like to thank Micha\u0142 Bentkowski and [intivesec](https://github.com/intivesec) for discovering these vulnerabilities.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes522/#securityfixes\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in the [TinyMCE repo](https://github.com/tinymce/tinymce/issues)\n* Email us at [infosec@tiny.cloud](mailto:infosec@tiny.cloud)",
"id": "GHSA-c78w-2gw7-gjv3",
"modified": "2021-01-14T17:50:10Z",
"published": "2020-05-11T20:00:15Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-c78w-2gw7-gjv3"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1010091"
},
{
"type": "WEB",
"url": "https://github.com/tinymce/tinymce/issues/4394"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "XSS in TinyMCE"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.