CVE-2021-31403 json
Timing side channel vulnerability in UIDL request handler in Vaadin 7 and 8
published 2021-04-19 5 y ago modified 2026-06-17 4 mo ago also GHSA-75xc-qvxh-27f8 , EUVD-2021-0784
- cvss
- 4.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- maven com.vaadin:vaadin-bom 7.7.24, 8.12.3
- maven com.vaadin:vaadin-server 7.7.24, 8.12.3
- vaadin vaadin 7.7.24, 8.12.3
- github.com/vaadin/framework#12190 pull request
- github.com/vaadin/framework#12188 pull request
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 2.5 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 4.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.vaadin:vaadin-bom | >=7.0.0, <7.7.24 >=8.0.0, <8.12.3 |
7.7.24 8.12.3 |
| maven | com.vaadin:vaadin-server | >=7.0.0, <7.7.24 >=8.0.0, <8.12.3 |
7.7.24 8.12.3 |
Affected products
- Vaadin Vaadin
- Vaadin vaadin-server
Classification
References
-
github.com
/vaadin/framework/pull/12190
web, patch, third-party-advisory
-
github.com
/vaadin/framework/pull/12188
web, patch, third-party-advisory
-
vaadin.com
/security/cve-2021-31403
web, vendor-advisory
-
github.com
/vaadin/framework/security/advisories/GHSA-75xc-qvxh-27f8
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-31403
advisory
Sources
- CVE List CVE-2021-31403
- GitHub Advisory GHSA-75xc-qvxh-27f8
- NVD CVE-2021-31403
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