Auth bypass in Mailvelope
CVE-2019-9149
Mailvelope prior to 3.3.0 allows private key operations without user interaction via its client-API. By modifying an URL parameter in Mailvelope, an attacker is able to sign (and encrypt) arbitrary messages with Mailvelope, assuming the private key password is cached. A second vulnerability allows an attacker to decrypt an arbitrary message when the GnuPG backend is used in Mailvelope.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (57.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/mailvelope/mailvelope/blob/master/Changelog.md (Third Party Advisory, Release Notes)
- www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Ext… (Third Party Advisory)
- www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Ext… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9149?
- CVE-2019-9149 is a medium-severity vulnerability in Mailvelope, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2019-07-09.
- How severe is CVE-2019-9149?
- Medium severity. CVSS v3 base score is 6.5 out of 10.