Vulnerability in Vaadin
CVE-2021-31403
Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:vaadin-server versions 7.0.0 through 7.7.23 (Vaadin 7.0.0 through 7.7.23), and 8.0.0 through 8.12.2 (Vaadin 8.0.0 through 8.12.2) allows attacker to guess a security token via timing attack
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Vaadin — versions 7.0.0
- Vaadin Vaadin-Server — versions 7.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vaadin.com/security/cve-2021-31403 (Vendor Advisory)
- github.com/vaadin/framework/pull/12190 (Patch, Third Party Advisory)
- github.com/vaadin/framework/pull/12188 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31403?
- CVE-2021-31403 is a medium-severity vulnerability in Vaadin, classified under CWE-208. CVSS score: 4.0/10. Published 2021-04-23.
- How severe is CVE-2021-31403?
- Medium severity. CVSS v3 base score is 4.0 out of 10.
- Is CVE-2021-31403 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.