{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40923 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2025-40923 is a high-severity vulnerability in MIYAGAWA Plack::Middleware::Session, published on 16 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-40923 and fix it if it is affected.\n\nWhat it is: CVE-2025-40923 is a high-severity vulnerability in MIYAGAWA Plack::Middleware::Session, published on 16 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-40923 in the wild and no public exploit code.\n\nAffected product: MIYAGAWA Plack::Middleware::Session. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-40923/ (Markdown: https://insights.sbomify.com/CVE-2025-40923/index.md)","id":"CVE-2025-40923","markdown":"https://insights.sbomify.com/CVE-2025-40923/index.md","name":"CVE-2025-40923","record":{"aliases":["DEBIAN-CVE-2025-40923","GHSA-868p-jhqw-wrgr","UBUNTU-CVE-2025-40923"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Perl session middleware","requires_auth":"none","summary":"Insecure session ID generation in Plack-Middleware-Session allows attackers to predict IDs and hijack user sessions.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CPANSec","cpe":[],"cvss":{"score":7.3,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-340","name":"Generation of Predictable Numbers or Identifiers"},{"id":"CWE-338","name":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely","id":"CVE-2025-40923","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2025"},"n_packages":0,"n_references":4,"next":{"headline":"Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely","id":"CVE-2025-40924"},"packages":[],"prev":{"headline":"Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl use insecurely generated nonces","id":"CVE-2025-40920"},"products":["Plack::Middleware::Session"],"published":"2025-07-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-11-04","vendors":["MIYAGAWA"]},"summary":"Insecure session ID generation in Plack-Middleware-Session allows attackers to predict IDs and hijack user sessions.","url":"https://insights.sbomify.com/CVE-2025-40923/"}