{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18937 exists.","fix":"No fix has been published for CVE-2026-18937 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18937 is a critical code injection vulnerability in Unknown Broken Link Checker, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18937 and fix it if it is affected.\n\nWhat it is: CVE-2026-18937 is a critical code injection vulnerability in Unknown Broken Link Checker, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18937 exists.\n\nAffected product: Unknown Broken Link Checker. 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-2026-18937/ (Markdown: https://insights.sbomify.com/CVE-2026-18937/index.md)","id":"CVE-2026-18937","markdown":"https://insights.sbomify.com/CVE-2026-18937/index.md","name":"CVE-2026-18937","record":{"aliases":["GHSA-c2xc-88v3-37g2"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can execute arbitrary code on WordPress sites using plain permalinks and classic themes via query variable injection in the Broken Link Checker plugin.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"WPScan","cpe":[],"cvss":{"score":9,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"The Broken Link Checker WordPress plugin before 2.4.12 does not limit which query variables it accepts from user input on sites using plain permalinks, allowing unauthenticated users to overwrite arbitrary PHP global variables, and to execute arbitrary code on the server when a classic (non-block)  is active.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-09-19","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":1,"refs":[{"date":"2026-09-19T16:10:02Z","kind":"github_poc","ref":"https://github.com/abraxas/CVE-2026-18937","stars":0,"title":"CVE-2026-18937 - Broken Link Checker - Critical 9.0 - Unauthenticated GET /?page_id=4\u0026shortcode_tags[blcpoc]=po... - Remote Code Execution"},{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-18937.yaml","stars":null,"title":"WordPress Broken Link Checker \u003c 2.4.12 - Remote Code Execution"}],"tier":"weaponised"},"has_fix":null,"headline":"Broken Link Checker \u003c 2.4.12 - Unauthenticated RCE via Query Variable Injection","id":"CVE-2026-18937","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Integer overflow in Red Hat Enterprise Linux 10","id":"CVE-2026-18938"},"packages":[],"prev":{"headline":"RSS Aggregator by Feedzy \u003c 5.2.6 - Author+ Cross-User Import Job Manipulation and Post Deletion","id":"CVE-2026-18934"},"products":["Broken Link Checker"],"published":"2026-08-19","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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-19","vendors":["Unknown"]},"summary":"Unauthenticated attackers can execute arbitrary code on WordPress sites using plain permalinks and classic themes via query variable injection in the Broken Link Checker plugin.","url":"https://insights.sbomify.com/CVE-2026-18937/"}