CVE-2021-38157 - Vulnerability Details - OpenCVE

Description

LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Published: 2021-08-06

Score: 6.1 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:leostream:connection_broker:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.00504.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://dgccpa.com
https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91
https://leostream.com
https://www.leostream.com/resources-2/product-lifecycle/

History

Wed, 25 Feb 2026 08:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Leostream Connection Broker

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-08-06T20:58:13.000Z

Updated: 2024-08-04T01:37:16.323Z

Reserved: 2021-08-06T00:00:00.000Z

Link: CVE-2021-38157

Vulnrichment

Updated: 2024-08-04T01:37:16.323Z

NVD

Status : Modified

Published: 2021-08-06T21:15:06.730

Modified: 2024-11-21T06:16:30.893

Link: CVE-2021-38157

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer"}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-08-06T20:58:12.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://dgccpa.com"}, {"tags": ["x_refsource_MISC"], "url": "https://leostream.com"}, {"tags": ["x_refsource_MISC"], "url": "https://www.leostream.com/resources-2/product-lifecycle/"}, {"tags": ["x_refsource_MISC"], "url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91"}], "tags": ["unsupported-when-assigned"], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-38157", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "** UNSUPPORTED WHEN ASSIGNED ** LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://dgccpa.com", "refsource": "MISC", "url": "https://dgccpa.com"}, {"name": "https://leostream.com", "refsource": "MISC", "url": "https://leostream.com"}, {"name": "https://www.leostream.com/resources-2/product-lifecycle/", "refsource": "MISC", "url": "https://www.leostream.com/resources-2/product-lifecycle/"}, {"name": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91", "refsource": "MISC", "url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91"}]}}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-38157", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-14T18:13:35.623778Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:15:29.771Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:37:16.323Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://dgccpa.com"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://leostream.com"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.leostream.com/resources-2/product-lifecycle/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-38157", "datePublished": "2021-08-06T20:58:13.000Z", "dateReserved": "2021-08-06T00:00:00.000Z", "dateUpdated": "2024-08-04T01:37:16.323Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://dgccpa.com", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://leostream.com", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://www.leostream.com/resources-2/product-lifecycle/", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:37:16.323Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-38157", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-14T18:13:35.623778Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-14T18:13:43.451Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"tags": ["unsupported-when-assigned"], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "references": [{"url": "https://dgccpa.com", "tags": ["x_refsource_MISC"]}, {"url": "https://leostream.com", "tags": ["x_refsource_MISC"]}, {"url": "https://www.leostream.com/resources-2/product-lifecycle/", "tags": ["x_refsource_MISC"]}, {"url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer"}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "n/a"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2021-08-06T20:58:12.000Z"}, "x_legacyV4Record": {"affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "n/a"}]}, "product_name": "n/a"}]}, "vendor_name": "n/a"}]}}, "data_type": "CVE", "references": {"reference_data": [{"url": "https://dgccpa.com", "name": "https://dgccpa.com", "refsource": "MISC"}, {"url": "https://leostream.com", "name": "https://leostream.com", "refsource": "MISC"}, {"url": "https://www.leostream.com/resources-2/product-lifecycle/", "name": "https://www.leostream.com/resources-2/product-lifecycle/", "refsource": "MISC"}, {"url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91", "name": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "** UNSUPPORTED WHEN ASSIGNED ** LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-38157", "STATE": "PUBLIC", "ASSIGNER": "cve@mitre.org"}}}}, "cveMetadata": {"cveId": "CVE-2021-38157", "state": "PUBLISHED", "dateUpdated": "2024-08-04T01:37:16.323Z", "dateReserved": "2021-08-06T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2021-08-06T20:58:13.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:leostream:connection_broker:*:*:*:*:*:*:*:*", "matchCriteriaId": "E45F4B00-DDC7-491D-A7E8-5A966CB0988E", "versionEndExcluding": "9.0.34.3", "versionStartIncluding": "9.0.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [{"sourceIdentifier": "cve@mitre.org", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer"}, {"lang": "es", "value": "** NO COMPATIBLE CUANDO SE ASIGN\u00d3 ** LeoStream Connection Broker versiones 9.x anteriores a 9.0.34.3, permite un ataque de tipo XSS reflejado no autenticado por medio del par\u00e1metro user /index.pl. NOTA: Esta vulnerabilidad s\u00f3lo afecta a productos que ya no son soportados por el mantenedor"}], "id": "CVE-2021-38157", "lastModified": "2024-11-21T06:16:30.893", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-08-06T21:15:06.730", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://dgccpa.com"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://leostream.com"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.leostream.com/resources-2/product-lifecycle/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://dgccpa.com"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://leostream.com"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.leostream.com/resources-2/product-lifecycle/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}