CVE-2021-32816

Regular expression Denial of Service in ProtonMail

ProtonMail Web Client is the official AngularJS web client for the ProtonMail secure email service. ProtonMail Web Client before version 3.16.60 has a regular expression denial-of-service vulnerability. This was fixed in commit 6687fb. There is a full report available in the referenced GHSL-2021-027.

Affected

ProtonMail · WebClient

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 GITHUB

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

1.01% chance of exploitation in the next 30 days, 63rd percentile

Published

2021-05-14

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://securitylab.github.com/advisories/GHSL-2021-027-redos-ProtonMail/

Security advisories

• ProtonMail/WebClient/commit/6687fbb867ef872c96cf4fde68cb6e9c58d3fddc
• https://securitylab.github.com/advisories/GHSL-2021-027-redos-ProtonMail

References

• CVE Record
• NVD entry