Blind Server-Side Reque st Forgery (SSRF) in eLabFTW <4.0.0

CVE-2021-32698
eLabFTW is an open source electronic lab notebook for research labs. 
This vulnerability allows an attacker to make GET requests on behalf of the server. It is "blind" because the attacker cannot see the result of the request. 
Issue has been patched in eLabFTW 4.0.0.

Vector:  CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Base Score:  6.8 MEDIUM 

1. Open eLabFTW
2. Got to 'Experiments'
3. In the description body place payload: <img src=[your ext. resource] />
4. Save experiment description
5. Launch 'Edit' one more time and save it again
6. Run 'Create PDF' and observe your resource (eg. burp collabolator). You will see that it gets multiple HTTP requests from eLabFTW internal infrastructure.

See: https://github.com/elabftw/elabftw/security/advisories/GHSA-mh6g-62p8-26m4