CVE-2021-31404 json
Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18
published 5y ago modified 4mo ago also GHSA-xwg3-qrcg-w9x6 , EUVD-2021-0890
- cvss
- 4.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:flow-server versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6), 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18), and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack.
Patch / fix
- maven com.vaadin:flow-server 1.0.14, 2.4.7, 5.0.3
- Vaadin Vaadin 14.0.0, 18.0.0
- Vaadin flow-server 2.0.0, 5.0.0
- github.com/vaadin/flow#9875 pull request
Is CVE-2021-31404 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).
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:flow-server | >=1.0.0, <1.0.14 >=1.1.0, <2.4.7 >=3.0.0, <5.0.3 |
1.0.14 2.4.7 5.0.3 |
Affected products
- Vaadin Vaadin
- Vaadin flow-server
Classification
References
-
github.com
/vaadin/flow/pull/9875
web, patch, third-party-advisory
-
vaadin.com
/security/cve-2021-31404
web, vendor-advisory
-
github.com
/vaadin/flow/security/advisories/GHSA-xwg3-qrcg-w9x6
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-31404
advisory
Sources
- CVE List CVE-2021-31404
- GitHub Advisory GHSA-xwg3-qrcg-w9x6
- NVD CVE-2021-31404
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.