### Impact TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript. ### Patches This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later. ### Workarounds No official workaround available. ### Acknowledgements Tiny thanks [maple3142](https://github.com/maple3142) (<https://maple3142.net>) of DEVCORE for their help identifying this vulnerability. ### References Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.
Update tinymce/tinymce to 7.1.0; tinymce to 7.1.0; TinyMCE to 7.1.0 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanTinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs affects tinymce/tinymce (composer), tinymce (npm), TinyMCE (nuget). Severity is high. ### Impact TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript. ### Patches This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later. ### Workarounds No official workaround available. ### Acknowledgements Tiny thanks [maple3142](https://github.com/maple3142) (<https://maple3142.net>) of DEVCORE for their help identifying this vulnerability. ### References Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.
AI coding agents often install or upgrade packages automatically in composer, npm and nuget. A high vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range | Fixed version |
|---|
### Impact TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript. ### Patches This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later. ### Workarounds No official workaround available. ### Acknowledgements Tiny thanks [maple3142](https://github.com/maple3142) (<https://maple3142.net>) of DEVCORE for their help identifying this vulnerability. ### References Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.
Update tinymce/tinymce to 7.1.0; tinymce to 7.1.0; TinyMCE to 7.1.0 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanTinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs affects tinymce/tinymce (composer), tinymce (npm), TinyMCE (nuget). Severity is high. ### Impact TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript. ### Patches This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later. ### Workarounds No official workaround available. ### Acknowledgements Tiny thanks [maple3142](https://github.com/maple3142) (<https://maple3142.net>) of DEVCORE for their help identifying this vulnerability. ### References Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.
AI coding agents often install or upgrade packages automatically in composer, npm and nuget. A high vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range | Fixed version |
|---|
| tinymce/tinymcecomposer | >=6.8.0,<7.1.0 | 7.1.0 |
|---|
| tinymcenpm | >=6.8.0,<7.1.0 | 7.1.0 |
|---|
| TinyMCEnuget | >=6.8.0,<7.1.0 | 7.1.0 |
|---|
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard| tinymce/tinymcecomposer | >=6.8.0,<7.1.0 | 7.1.0 |
|---|
| tinymcenpm | >=6.8.0,<7.1.0 | 7.1.0 |
|---|
| TinyMCEnuget | >=6.8.0,<7.1.0 | 7.1.0 |
|---|
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard