CVE-2021-31412
Possible route enumeration in production mode via RouteNotFoundError view in Vaadin 10, 11-14, and 15-19
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Possible route enumeration in production mode via RouteNotFoundError view in Vaadin 10, 11-14, and 15-19
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
- Record
CVE-2021-31412- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-1295
- Updated
- 2026-11-02
EUVDEUVD-2021-1386
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
- Record
EUVD-2021-1386- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qrg9-f472-qwfm
Possible route enumeration in production mode via RouteNotFoundError view in Vaadin 10, 11-14, and 15-19
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
- Record
GHSA-qrg9-f472-qwfm- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-20, CWE-668, CWE-1295
- Updated
- 2026-11-02
NVD
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
- Record
CVE-2021-31412- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-1295, CWE-20
- Updated
- 2026-11-02
OSV
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
- Record
CVE-2021-31412- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-qrg9-f472-qwfm
Possible route enumeration in production mode via RouteNotFoundError view in Vaadin 10, 11-14, and 15-19
Improper sanitization of path in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.14 (Vaadin 10.0.0 through 10.0.18), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows network attacker to enumerate all available routes via crafted HTTP request when application is running in production mode and no custom handler for NotFoundException is provided.
- Record
GHSA-qrg9-f472-qwfm- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-1295, CWE-20, CWE-668
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
com.vaadin:vaadin-bomMaven |
10.0.0 to 10.0.18 | 10.0.19 |
com.vaadin:vaadin-bomMaven |
11.0.0 up to 14.0.0 | 14.0.0 |
com.vaadin:vaadin-bomMaven |
15.0.0 to 19.0.8 | 19.0.9 |
com.vaadin:vaadin-bomMaven |
10.0.0 up to 10.0.19, plus listed versions 10.0.110.0.1010.0.1110.0.1210.0.13 Show 13 moreShow less10.0.1410.0.1510.0.1610.0.1710.0.1810.0.210.0.310.0.410.0.510.0.610.0.710.0.810.0.9 |
10.0.19 |
com.vaadin:vaadin-bomMaven |
11.0.0 up to 14.6.2, plus listed versions 11.0.111.0.211.0.311.0.412.0.0 Show 45 moreShow less12.0.112.0.212.0.312.0.412.0.512.0.612.0.713.0.013.0.113.0.1013.0.1113.0.1213.0.1313.0.213.0.313.0.413.0.513.0.613.0.713.0.813.0.914.0.014.0.114.0.1014.0.1114.0.1214.0.1314.0.1414.0.1514.0.214.0.314.0.414.0.514.0.614.0.714.0.814.0.914.1.014.1.114.1.1614.1.1714.1.1814.1.1914.1.214.1.20 |
14.6.2 |
com.vaadin:vaadin-bomMaven |
15.0.0 up to 19.0.9, plus listed versions 15.0.115.0.215.0.315.0.415.0.5 Show 35 moreShow less15.0.616.0.016.0.116.0.216.0.316.0.416.0.517.0.017.0.117.0.1017.0.1117.0.217.0.317.0.417.0.617.0.717.0.817.0.918.0.018.0.118.0.218.0.318.0.418.0.518.0.618.0.719.0.019.0.119.0.219.0.319.0.419.0.519.0.619.0.719.0.8 |
19.0.9 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31412 is a medium vulnerability (CVSS 5.3) in Flow Flow-server, published June 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.32%, the 70th percentile. Fixed in com.vaadin:vaadin-bom 10.0.19.
References
Left out here: 44 versions. The JSON record has them.