{"answers":{"affected":"2 open source packages ship an affected version, including getgrav/grav.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61453 exists.","fix":"Upgrade getgrav/grav to 2.0.1 or later.","what":"CVE-2026-61453 is a medium-severity cross-site scripting vulnerability in getgrav grav, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-61453 and fix it if it is affected.\n\nWhat it is: CVE-2026-61453 is a medium-severity cross-site scripting vulnerability in getgrav grav, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61453 exists.\n\nAffected packages and fixed versions:\n- getgrav/grav (Packagist): affected from 2.0.0; fixed in 2.0.1\n- getgrav/grav (Packagist): affected from 2.0.0; fixed in 2.0.1\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-2026-61453/ (Markdown: https://insights.sbomify.com/CVE-2026-61453/index.md)","id":"CVE-2026-61453","markdown":"https://insights.sbomify.com/CVE-2026-61453/index.md","name":"CVE-2026-61453","record":{"aliases":["CVE-2026-61710","GHSA-2c4f-86xc-cr74"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Grav CMS","requires_auth":"none","summary":"Attackers with page-write permissions can execute arbitrary JavaScript in visitors' browsers by bypassing XSS validation via Twig string concatenation.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Grav v2.0.0 contains a cross-site scripting vulnerability (fixed in 2.0.1). The XSS blueprint validator (Security::detectXss()) runs on raw page content before Twig processing. When Twig content processing is enabled (twig_content.process_enabled: true), an attacker with page-write API permission can use Twig's string concatenation operator (~) to dynamically construct event handler names, dangerous tag names, or dangerous protocols at render time (e.g. {% set x = \"on\" ~ \"error\" %}). The validator sees only the harmless Twig expression and allows the content, but after Twig rendering the output (rendered via {{ page.content|raw }}) contains an active payload such as \u003cimg src=1 onerror=alert(1)\u003e, executing arbitrary JavaScript in visitors' browsers.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Grav before 2.0.1 XSS via Twig String Concatenation","id":"CVE-2026-61453","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Grav before 2.0.4 Information Disclosure via __GRAV_CONFIG__","id":"CVE-2026-61454"},"packages":[{"ecosystem":"Packagist","fixed":["2.0.1"],"introduced":["2.0.0"],"last_affected":[],"package":"getgrav/grav","purl":null,"source":"GHSA-2c4f-86xc-cr74"},{"ecosystem":"Packagist","fixed":["2.0.1"],"introduced":["2.0.0"],"last_affected":[],"package":"getgrav/grav","purl":"pkg:composer/getgrav/grav","source":"GHSA-2c4f-86xc-cr74"}],"prev":{"headline":"Grav before 2.0.4 Improper Session Invalidation JWT Access Tokens","id":"CVE-2026-61452"},"products":["grav"],"published":"2026-07-15","related":[],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["getgrav"]},"summary":"Attackers with page-write permissions can execute arbitrary JavaScript in visitors' browsers by bypassing XSS validation via Twig string concatenation.","url":"https://insights.sbomify.com/CVE-2026-61453/"}