Mustache helper tags that were included in template contexts were not being escaped before that context was injected into another Mustache helper, which could result in script injection in some templates.
| Severity/Risk: | Serious |
| Versions affected: | 3.7 to 3.7.1, 3.6 to 3.6.5, 3.5 to 3.5.7 and earlier unsupported versions |
| Versions fixed: | 3.7.2, 3.6.6 and 3.5.8 |
| Reported by: | Sam Hemelryk, Andrew Nicols |
| CVE identifier: | CVE-2019-14827 |
| Changes (master): | http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-62284 |
| Tracker issue: | MDL-62284 JavaScript injection possible in some Mustache templates via recursive rendering from contexts |