{"answers":{"affected":"2 open source packages ship an affected version, including yiisoft/yii2-dev. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3689 in the wild and no public exploit code.","fix":"Upgrade yiisoft/yii2-dev to 2.0.43 or later.","what":"CVE-2021-3689 is a high-severity vulnerability in yiisoft/yii2, published on 10 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3689 and fix it if it is affected.\n\nWhat it is: CVE-2021-3689 is a high-severity vulnerability in yiisoft/yii2, published on 10 Aug 2021. 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-2021-3689 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- yiisoft/yii2-dev (Packagist): affected all versions; fixed in 2.0.43\n- yiisoft/yii2-dev (Packagist): affected all versions; fixed in 2.0.43\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-2021-3689/ (Markdown: https://insights.sbomify.com/CVE-2021-3689/index.md)","id":"CVE-2021-3689","markdown":"https://insights.sbomify.com/CVE-2021-3689/index.md","name":"CVE-2021-3689","record":{"aliases":["GHSA-hq3v-rg6f-6hx4"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Yii2 PHP framework","requires_auth":"none","summary":"The Yii2 framework uses a predictable random number generator, potentially allowing attackers to bypass security mechanisms relying on randomness.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"yii","vendor":"yiiframework"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-330","name":"Use of Insufficiently Random Values"},{"id":"CWE-1241","name":"Use of Predictable Algorithm in Random Number Generator"}],"description":"yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator","ecosystems":["Packagist"],"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":"Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2","id":"CVE-2021-3689","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"weak_cryptography","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Undertow vulnerable to memory exhaustion due to buffer leak","id":"CVE-2021-3690"},"packages":[{"ecosystem":"Packagist","fixed":["2.0.43"],"introduced":["0"],"last_affected":[],"package":"yiisoft/yii2-dev","purl":null,"source":"GHSA-hq3v-rg6f-6hx4"},{"ecosystem":"Packagist","fixed":["2.0.43"],"introduced":["0"],"last_affected":[],"package":"yiisoft/yii2-dev","purl":"pkg:composer/yiisoft/yii2-dev","source":"GHSA-hq3v-rg6f-6hx4"}],"prev":{"headline":"Path traversal in Red Hat JBCS HTTP Server","id":"CVE-2021-3688"},"products":["yiisoft/yii2"],"published":"2021-08-10","related":[{"cvss_score":9,"headline":"Yiiframework Yii Improper Protection of Alternate Path","id":"CVE-2024-58136","kev_date_added":"2025-05-02","published":"2025-04-10"},{"cvss_score":9.8,"headline":"Yii2 allows attackers to execute any local .php file via a relative path in the view parameter","id":"CVE-2015-5467","kev_date_added":null,"published":"2023-09-21"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2023-26750","kev_date_added":null,"published":"2023-04-04"},{"cvss_score":9.8,"headline":"Yii SQL injection vulnerability","id":"CVE-2018-7269","kev_date_added":null,"published":"2018-03-21"},{"cvss_score":9.8,"headline":"yii2-redis Potential Remote code execution","id":"CVE-2018-8073","kev_date_added":null,"published":"2018-03-21"},{"cvss_score":8.9,"headline":"Unsafe deserialization in Yii 2","id":"CVE-2020-15148","kev_date_added":null,"published":"2020-09-15"},{"cvss_score":8.1,"headline":"Unsafe Reflection in base Component class in yiisoft/yii2","id":"CVE-2024-4990","kev_date_added":null,"published":"2025-03-20"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["yiisoft"]},"summary":"The Yii2 framework uses a predictable random number generator, potentially allowing attackers to bypass security mechanisms relying on randomness.","url":"https://insights.sbomify.com/CVE-2021-3689/"}