{"answers":{"affected":"4 open source packages ship an affected version, including october/system. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-24906 in the wild and no public exploit code.","fix":"Upgrade october/system to a fixed version for your release line: 3.7.14 or 4.1.10.","what":"CVE-2026-24906 is a medium-severity cross-site scripting vulnerability in Octobercms October, published on 14 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-24906 and fix it if it is affected.\n\nWhat it is: CVE-2026-24906 is a medium-severity cross-site scripting vulnerability in Octobercms October, published on 14 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-24906 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- october/system (Packagist): affected all versions; fixed in 3.7.14\n- october/system (Packagist): affected all versions; fixed in 3.7.14\n- october/system (Packagist): affected from 4.0.0; fixed in 4.1.10\n- october/system (Packagist): affected from 4.0.0; fixed in 4.1.10\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-2026-24906/ (Markdown: https://insights.sbomify.com/CVE-2026-24906/index.md)","id":"CVE-2026-24906","markdown":"https://insights.sbomify.com/CVE-2026-24906/index.md","name":"CVE-2026-24906","record":{"aliases":["GHSA-6qmh-j78v-ffp7"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"October CMS","requires_auth":"low_privilege","summary":"Authenticated attackers can inject malicious scripts into backend editor settings, leading to code execution and privilege escalation when victims open rich text editors.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"october","vendor":"octobercms"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a Stored Cross-Site Scripting (XSS) vulnerability in the Backend Editor Settings. The Markup Classes fields (used for paragraph styles, inline styles, table styles, etc.) did not sanitize input to valid CSS class name characters. Malicious values were rendered unsanitized in Froala editor dropdown menus, allowing JavaScript execution when any user opened a RichEditor. Exploitation could lead to privilege escalation if a superuser opens any RichEditor during routine content editing (e.g., editing a blog post), and requires authenticated backend access with editor settings permissions. This issue has been fixed in versions 3.7.14 and 4.1.10. To workaround this issue, restrict editor settings permissions to fully trusted administrators only","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":"October CMS has Stored XSS in its Backend Editor Markup Classes","id":"CVE-2026-24906","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"octobercms:october","products":["octobercms:october"],"type":"xss","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"October CMS has Stored XSS via Event Log Mail Preview","id":"CVE-2026-24907"},"packages":[{"ecosystem":"Packagist","fixed":["3.7.14"],"introduced":["0"],"last_affected":[],"package":"october/system","purl":null,"source":"GHSA-6qmh-j78v-ffp7"},{"ecosystem":"Packagist","fixed":["3.7.14"],"introduced":["0"],"last_affected":[],"package":"october/system","purl":"pkg:composer/october/system","source":"GHSA-6qmh-j78v-ffp7"},{"ecosystem":"Packagist","fixed":["4.1.10"],"introduced":["4.0.0"],"last_affected":[],"package":"october/system","purl":null,"source":"GHSA-6qmh-j78v-ffp7"},{"ecosystem":"Packagist","fixed":["4.1.10"],"introduced":["4.0.0"],"last_affected":[],"package":"october/system","purl":"pkg:composer/october/system","source":"GHSA-6qmh-j78v-ffp7"}],"prev":{"headline":"Inspektor Gadget has a Command Injection vulnerability in Makefile.build","id":"CVE-2026-24905"},"products":["october"],"published":"2026-04-14","related":[{"cvss_score":8.2,"headline":"October CMS Improper Authentication","id":"CVE-2021-32648","kev_date_added":"2022-01-18","published":"2021-08-26"},{"cvss_score":9.8,"headline":"October CMS Session ID not invalidated after logout","id":"CVE-2021-3311","kev_date_added":null,"published":"2021-02-05"},{"cvss_score":9.8,"headline":"October CMS File Upload Vulnerability","id":"CVE-2017-1000194","kev_date_added":null,"published":"2017-11-17"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2017-1000196","kev_date_added":null,"published":"2017-11-17"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2017-1000197","kev_date_added":null,"published":"2017-11-17"},{"cvss_score":9.1,"headline":"October CMS safe mode bypass using Twig sandbox escape","id":"CVE-2023-44382","kev_date_added":null,"published":"2023-12-01"},{"cvss_score":8.8,"headline":"Authenticated file write leads to remote code execution in october/system","id":"CVE-2021-32649","kev_date_added":null,"published":"2022-01-14"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-16","vendors":["octobercms"]},"summary":"Authenticated attackers can inject malicious scripts into backend editor settings, leading to code execution and privilege escalation when victims open rich text editors.","url":"https://insights.sbomify.com/CVE-2026-24906/"}