Vulnerability-Lookup

FKIE_CVE-2021-31406

Vulnerability from fkie_nvd - Published: 2021-04-23 16:15 - Updated: 2026-06-17 03:51

Severity

4.0 (Medium) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
2.5 (Low) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.

References

URL	Tags
security@vaadin.com	https://github.com/vaadin/flow/pull/10157	Patch, Third Party Advisory
security@vaadin.com	https://vaadin.com/security/cve-2021-31406	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/vaadin/flow/pull/10157	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://vaadin.com/security/cve-2021-31406	Vendor Advisory

Impacted products

Vendor	Product	Version
vaadin	flow	*
vaadin	flow	6.0.0
vaadin	vaadin	*
vaadin	vaadin	19.0.0

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "product": "Vaadin",
          "vendor": "Vaadin",
          "versions": [
            {
              "status": "affected",
              "version": "19.0.0"
            },
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              "version": "15.0.0",
              "versionType": "custom"
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          "vendor": "Vaadin",
          "versions": [
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              "version": "6.0.0"
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  "configurations": [
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              "matchCriteriaId": "56B0887F-B5F8-49C2-8D19-C72F99C053D0",
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            },
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              "criteria": "cpe:2.3:a:vaadin:vaadin:19.0.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "B26A2E69-D944-4470-A8C3-C5E80DDECFF5",
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            }
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack."
    },
    {
      "lang": "es",
      "value": "La comparaci\u00f3n non-constant-time de tokens CSRF en el manejador de peticiones de endpoint en com.vaadin:flow-server versiones 3.0.0 hasta 5.0.3 (Vaadin versiones 15.0.0 hasta 18.0.6) y com.vaadin:fusion-endpoint versi\u00f3n 6.0.0 (Vaadin versi\u00f3n 19.0.0), permite al atacante adivinar un token de seguridad para los endpoints de Fusion por medio de un ataque de sincronizaci\u00f3n"
    }
  ],
  "id": "CVE-2021-31406",
  "lastModified": "2026-06-17T03:51:43.330",
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          "baseScore": 1.9,
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          "version": "2.0"
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        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
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  "vulnStatus": "Modified",
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      "type": "Secondary"
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  ]
}

CVE-2021-31406 (GCVE-0-2021-31406)

Vulnerability from cvelistv5 – Published: 2021-04-23 16:05 – Updated: 2024-09-17 00:02

Title

Timing side channel vulnerability in endpoint request handler in Vaadin 15-19

Summary

Severity

4 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE

CWE-208 - Information Exposure Through Timing Discrepancy

Assigner

Vaadin mitre root

References

2 references

URL	Tags
https://vaadin.com/security/cve-2021-31406	x_refsource_MISC
https://github.com/vaadin/flow/pull/10157	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version
Vaadin	Vaadin	Affected: 19.0.0 Affected: 15.0.0 , < * (custom)
Vaadin	flow-server	Affected: 6.0.0 Affected: 3.0.0 , < * (custom)

Date Public

2021-03-19 00:00

Credits

This issue was discovered and responsibly reported by Xhelal Likaj.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.