{"answers":{"affected":"4 open source packages ship an affected version, including craftcms/cms. It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2025-35939 in the wild since at least 2 Jun 2025.","fix":"Upgrade craftcms/cms to a fixed version for your release line: 4.15.3 or 5.7.5. US federal agencies must fix it by 23 Jun 2025.","what":"CVE-2025-35939 is a medium-severity code injection vulnerability in Craftcms Craft Cms, published on 7 May 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-2025-35939 and fix it if it is affected.\n\nWhat it is: CVE-2025-35939 is a medium-severity code injection vulnerability in Craftcms Craft Cms, published on 7 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2025-35939 in the wild since at least 2 Jun 2025.\n\nAffected packages and fixed versions:\n- craftcms/cms (Packagist): affected all versions; fixed in 4.15.3\n- craftcms/cms (Packagist): affected all versions; fixed in 4.15.3\n- craftcms/cms (Packagist): affected from 5.0.0-alpha.1; fixed in 5.7.5\n- craftcms/cms (Packagist): affected from 5.0.0-alpha.1; fixed in 5.7.5\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-2025-35939/ (Markdown: https://insights.sbomify.com/CVE-2025-35939/index.md)","id":"CVE-2025-35939","markdown":"https://insights.sbomify.com/CVE-2025-35939/index.md","name":"CVE-2025-35939","record":{"aliases":["GHSA-7vrx-9684-xrf2"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Craft CMS","requires_auth":"none","summary":"Unauthenticated attackers can inject arbitrary PHP code into session files via unsanitized return URLs, potentially leading to remote code execution.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisa-cg","cpe":[{"product":"craft_cms","vendor":"craftcms"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-472","name":"External Control of Assumed-Immutable Web Parameter"}],"description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"exploited"},"has_fix":true,"headline":"Craft CMS External Control of Assumed-Immutable Web Parameter","id":"CVE-2025-35939","indexable":true,"kev":{"dateAdded":"2025-06-02","dueDate":"2025-06-23","knownRansomwareCampaignUse":"Unknown","product":"Craft CMS","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","vendorProject":"Craft CMS","vulnerabilityName":"Craft CMS External Control of Assumed-Immutable Web Parameter Vulnerability"},"kind":"cve","links":{"ecosystem":"Packagist","product":"craftcms:craft_cms","products":["craftcms:craft_cms"],"type":"code_injection","year":"2025"},"n_packages":4,"n_references":5,"next":{"headline":"Hard-coded ArchiverSpaApi JWT Signing Key","id":"CVE-2025-35940"},"packages":[{"ecosystem":"Packagist","fixed":["4.15.3"],"introduced":["0"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-7vrx-9684-xrf2"},{"ecosystem":"Packagist","fixed":["4.15.3"],"introduced":["0"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-7vrx-9684-xrf2"},{"ecosystem":"Packagist","fixed":["5.7.5"],"introduced":["5.0.0-alpha.1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-7vrx-9684-xrf2"},{"ecosystem":"Packagist","fixed":["5.7.5"],"introduced":["5.0.0-alpha.1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-7vrx-9684-xrf2"}],"prev":{"headline":"conda-forge openssl-feedstock writable OPENSSLDIR","id":"CVE-2025-35471"},"products":["CMS"],"published":"2025-05-07","related":[{"cvss_score":10,"headline":"Craft CMS Code Injection","id":"CVE-2025-32432","kev_date_added":"2026-03-20","published":"2025-04-25"},{"cvss_score":9.3,"headline":"Craft CMS Code Injection","id":"CVE-2024-56145","kev_date_added":"2025-06-02","published":"2024-12-18"},{"cvss_score":8.1,"headline":"Craft CMS Code Injection","id":"CVE-2025-23209","kev_date_added":"2025-02-20","published":"2025-01-18"},{"cvss_score":10,"headline":"Craft CMS Remote Code Execution vulnerability","id":"CVE-2023-41892","kev_date_added":null,"published":"2023-09-13"},{"cvss_score":9.8,"headline":"Craft CMS Remote Code Injection","id":"CVE-2021-27903","kev_date_added":null,"published":"2021-06-30"},{"cvss_score":9.8,"headline":"SEOmatic for CraftCMS allows Server-Side Template Injection","id":"CVE-2020-9757","kev_date_added":null,"published":"2020-03-04"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-26","vendors":["Craft"]},"summary":"Unauthenticated attackers can inject arbitrary PHP code into session files via unsanitized return URLs, potentially leading to remote code execution.","url":"https://insights.sbomify.com/CVE-2025-35939/"}