{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-40923",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-16T20:47:49.157521Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-16T20:48:17.516Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Plack-Middleware-Session",
          "product": "Plack::Middleware::Session",
          "programFiles": [
            "lib/Plack/Session/State.pm"
          ],
          "repo": "https://github.com/plack/Plack-Middleware-Session",
          "vendor": "MIYAGAWA",
          "versions": [
            {
              "lessThan": "0.35",
              "status": "affected",
              "version": "0.01",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003ePlack-Middleware-Session before version 0.35 for Perl generates session ids insecurely.\u003c/div\u003e\u003cdiv\u003eThe default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\u003c/div\u003e\u003cdiv\u003ePredicable session ids could allow an attacker to gain access to systems.\u003c/div\u003e"
            }
          ],
          "value": "Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely.\n\nThe default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\n\nPredicable session ids could allow an attacker to gain access to systems."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-340",
              "description": "CWE-340 Generation of Predictable Numbers or Identifiers",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-338",
              "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-16T13:05:03.782Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/MIYAGAWA/Plack-Middleware-Session-0.34/source/lib/Plack/Session/State.pm#L22"
        },
        {
          "url": "https://github.com/plack/Plack-Middleware-Session/pull/52"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/plack/Plack-Middleware-Session/commit/1fbfbb355e34e7f4b3906f66cf958cedadd2b9be.patch"
        },
        {
          "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eUsers are advised to upgrade to Plack-Middleware-Session v0.35 or later.\u003c/div\u003e"
            }
          ],
          "value": "Users are advised to upgrade to Plack-Middleware-Session v0.35 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eUsers who are unable to upgrade are advised to change the sid_generator attribute of Plack::Session::State to a function that returns a securely generated session id based on a secure source of entropy from the system.\u003c/div\u003e"
            }
          ],
          "value": "Users who are unable to upgrade are advised to change the sid_generator attribute of Plack::Session::State to a function that returns a securely generated session id based on a secure source of entropy from the system."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2025-40923",
    "datePublished": "2025-07-16T13:05:03.782Z",
    "dateReserved": "2025-04-16T09:05:34.362Z",
    "dateUpdated": "2025-07-16T20:48:17.516Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}