{"answers":{"affected":"2 open source packages ship an affected version, including wwbn/avideo.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43876 exists.","fix":"No fix has been published for CVE-2026-43876 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-43876 is a medium-severity cross-site scripting vulnerability in WWBN AVideo, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-43876 and fix it if it is affected.\n\nWhat it is: CVE-2026-43876 is a medium-severity cross-site scripting vulnerability in WWBN AVideo, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43876 exists.\n\nAffected packages and fixed versions:\n- wwbn/avideo (Packagist): affected all versions up to 29.0; no fix listed\n- wwbn/avideo (Packagist): affected all versions up to 29.0; no fix listed\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-2026-43876/ (Markdown: https://insights.sbomify.com/CVE-2026-43876/index.md)","id":"CVE-2026-43876","markdown":"https://insights.sbomify.com/CVE-2026-43876/index.md","name":"CVE-2026-43876","record":{"aliases":["GHSA-g9cm-rxp7-6gv5"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["security_bypass","other"],"network_reachable":"yes","non_default_config":false,"product_category":"Video platform","requires_auth":"low_privilege","summary":"Authenticated users can inject HTML into subscriber notification emails, enabling platform-branded phishing attacks against channel subscribers.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/notifySubscribers.json.php takes the raw message POST parameter and passes it into sendSiteEmail(), which substitutes it directly into an HTML email template (via str_replace on the {message} placeholder) and renders it with PHPMailer::msgHTML(). There is no HTML sanitization, character escaping, or output encoding on the attacker-controlled message between $_POST['message'] and the rendered email. Any authenticated user with upload permission can therefore broadcast arbitrary HTML — phishing links, tracking pixels, CSS/UI spoofing — to every subscriber on their channel (up to 10,000 recipients per invocation). The email is sent From: the platform's configured contact address and wrapped in the site's official logo and title, so attacker-supplied HTML arrives with the appearance of an official platform communication. Commit https://github.com/WWBN/AVideo/commit/ contains an updated fix.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"AVideo: HTML Injection in notifySubscribers.json.php Allows Platform-Branded Phishing Emails to Channel Subscribers","id":"CVE-2026-43876","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"AVideo: CSRF in userSavePhoto.php Allows Cross-Origin Overwrite of Authenticated Users' Profile Photos with Arbitrary Content","id":"CVE-2026-43877"},"packages":[{"ecosystem":"Packagist","fixed":[],"introduced":["0"],"last_affected":["29.0"],"package":"wwbn/avideo","purl":null,"source":"GHSA-g9cm-rxp7-6gv5"},{"ecosystem":"Packagist","fixed":[],"introduced":["0"],"last_affected":["29.0"],"package":"wwbn/avideo","purl":"pkg:composer/wwbn/avideo","source":"GHSA-g9cm-rxp7-6gv5"}],"prev":{"headline":"WWBN AVideo: Password Hash Leaked in MobileManager OAuth Redirect URL Enables Account Takeover","id":"CVE-2026-43875"},"products":["AVideo"],"published":"2026-05-11","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":"2026-05-13","vendors":["WWBN"]},"summary":"Authenticated users can inject HTML into subscriber notification emails, enabling platform-branded phishing attacks against channel subscribers.","url":"https://insights.sbomify.com/CVE-2026-43876/"}