{
  "cveId": "CVE-2021-39144",
  "url": "https://patchblox.com/security/cve/CVE-2021-39144",
  "summary": "CVE-2021-39144 is fixed in libxstream-java on 1 platform, first by libxstream-java 1.4.11.1-1\u002Bdeb10u4build0.18.04.1, released December 27, 2022. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 10, 2023. Patch Radar priority: Patch now.",
  "title": "libxstream-java: XStream is a simple library to serialize objects to XML and back again",
  "description": "XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream\u0027s security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.",
  "published": "2021-08-23T11:15:00Z",
  "severity": "Medium",
  "epss": 0.98124,
  "epssPercentile": 0.99912,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": false,
  "disclosed": false,
  "kev": {
    "added": "2023-03-10T00:00:00Z",
    "due": "2023-03-31T00:00:00Z",
    "ransomware": false,
    "requiredAction": "Apply updates per vendor instructions."
  },
  "fixes": [
    {
      "platform": "linux",
      "product": "libxstream-java",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.4.11.1-1\u002Bdeb10u4build0.18.04.1",
      "fix": "libxstream-java 1.4.11.1-1\u002Bdeb10u4build0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libxstream-java-1.4.11.1-1-deb10u4build0.18.04.1",
      "released": "2022-12-27T16:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libxstream-java",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.4.11.1-1ubuntu0.3",
      "fix": "libxstream-java 1.4.11.1-1ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libxstream-java-1.4.11.1-1ubuntu0.3",
      "released": "2022-12-27T16:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}