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CVE-2021-26074

Estado: ModificadaMedia (6.5)—

Broken Authentication in Atlassian Connect Spring Boot (ACSB) from version 1.1.0 before version 2.1.3: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions from version 1.1.0 before version 2.1.3 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Atlassian — Connect Spring Boot

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-26074",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2021-26074",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-02-12T20:51:32.887613Z"
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          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
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          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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    "cvssMetricV31": [
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        "cvssData": {
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          "userInteraction": "NONE",
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          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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  "affected": [
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          "product": "Atlassian Connect Spring Boot (ACSB)",
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  "published": "2021-04-16T03:15:12.113",
  "references": [
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      "url": "https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-allows-bypass-of-app-qsh-verification-via-context-jwts/47072",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "lang": "en",
      "value": "Broken Authentication in Atlassian Connect Spring Boot (ACSB) from version 1.1.0 before version 2.1.3: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions from version 1.1.0 before version 2.1.3 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app."
    },
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      "value": "Autenticación rota en Atlassian Connect Spring Boot (ACSB) desde la versión 1.1.0 versiones anteriores a 2.1.3: Atlassian Connect Spring Boot es un paquete Java Spring Boot para crear aplicaciones de Atlassian Connect. La autenticación entre los productos de Atlassian y la aplicación Atlassian Connect Spring Boot se produce con un JWT de servidor a servidor o un JWT de contexto. Las versiones de Atlassian Connect Spring Boot desde la versión 1.1.0 versiones anteriores a 2.1.3 aceptan erróneamente JWTs de contexto en los puntos finales del ciclo de vida (como la instalación) cuando solo deberían aceptarse JWTs de servidor a servidor, lo que permite a un atacante enviar eventos de reinstalación autenticados a una aplicación"
    }
  ],
  "lastModified": "2026-06-17T03:42:48.300",
  "configurations": [
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