Insufficient capability checks meant message deletions were not limited to the current user.
| Severity/Risk: | Serious |
| Versions affected: | 3.11, 3.10 to 3.10.4, 3.9 to 3.9.7 and earlier unsupported versions |
| Versions fixed: | 3.11.1, 3.10.5 and 3.9.8 |
| Reported by: | 0xkasper |
| CVE identifier: | CVE-2021-36397 |
| Changes (master): | http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-71917 |
| Tracker issue: | MDL-71917 Messaging web service allows deletion of other users' messages |
Read more https://moodle.org/mod/forum/discuss.php?d=424803&parent=1710822