Messages required extra sanitizing before updating the conversation overview, to prevent the risk of stored XSS.
| Severity/Risk: | Serious |
| Versions affected: | 3.8 |
| Versions fixed: | 3.8.1 |
| Reported by: | Cid da Costa |
| Workaround: | Disable the messaging system until the patch has been applied. |
| CVE identifier: | CVE-2020-1691 |
| Changes (master): | http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-67637 |
| Tracker issue: | MDL-67637 Stored XSS in message conversation overview |