CVE-2021-20856

CVSS V2 Low 3.5 CVSS V3 Medium 5.4
Description
Cross-site scripting vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.
Overview
  • CVE ID
  • CVE-2021-20856
  • Assigner
  • vultures@jpcert.or.jp
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-01T03:15:06
  • Last Modified Date
  • 2021-12-02T16:28:41
Weakness Enumerations
CWE URL
CWE-79 http://cwe.mitre.org/data/definitions/79.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:elecom:wrh-733gbk_firmware:*:*:*:*:*:*:*:* 1 OR 1.02.9
cpe:2.3:h:elecom:wrh-733gbk:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:elecom:wrh-733gwh_firmware:*:*:*:*:*:*:*:* 1 OR 1.02.9
cpe:2.3:h:elecom:wrh-733gwh:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:S/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 3.5
  • Severity
  • LOW
  • Exploitability Score
  • 6.8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • REQUIRED
  • Scope
  • CHANGED
  • Confidentiality Impact
  • LOW
  • Availability Impact
  • NONE
  • Base Score
  • 5.4
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.3
  • Impact Score
  • 2.7
References
Reference URL Reference Tags
https://jvn.jp/en/jp/JVN88993473/index.html Third Party Advisory
https://www.elecom.co.jp/news/security/20211130-01/ Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-20856
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20856
History
Created Old Value New Value Data Type Notes
2022-05-10 06:43:34 Added to TrackCVE
2022-12-05 15:20:11 2021-12-01T03:15Z 2021-12-01T03:15:06 CVE Published Date updated
2022-12-05 15:20:11 2021-12-02T16:28:41 CVE Modified Date updated
2022-12-05 15:20:11 Analyzed Vulnerability Status updated