{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-48821 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-48821 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-48821 is a medium-severity cross-site scripting vulnerability in Shaarli, published on 17 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-48821 and fix it if it is affected.\n\nWhat it is: CVE-2026-48821 is a medium-severity cross-site scripting vulnerability in Shaarli, published on 17 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-48821 in the wild and no public exploit code.\n\nAffected product: Shaarli. 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-2026-48821/ (Markdown: https://insights.sbomify.com/CVE-2026-48821/index.md)","id":"CVE-2026-48821","markdown":"https://insights.sbomify.com/CVE-2026-48821/index.md","name":"CVE-2026-48821","record":{"aliases":["DEBIAN-CVE-2026-48821","GHSA-mw63-f9qj-c5h3","UBUNTU-CVE-2026-48821"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Shaarli bookmarking service","requires_auth":"high_privilege","summary":"An administrator running the thumbnail synchronizer can trigger DOM-based XSS via malicious bookmark titles, leading to session hijacking and privilege escalation.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a DOM-based Cross-Site Scripting (XSS) vulnerability in the Thumbnail Synchronizer feature. When an administrator runs the thumbnail update process, malicious bookmark titles are returned via an AJAX response and inserted into the DOM using innerHTML without proper sanitization. The issue originates from the interaction between the backend thumbnail update endpoint and the frontend JavaScript responsible for rendering update progress. On the backend, the ThumbnailsController::ajaxUpdate method returns bookmark data formatted using the 'raw' formatter. This includes the unescaped bookmark title in the JSON response. On the client side, the script thumbnails-update.js processes this AJAX response and dynamically updates the progress interface. Administrators using the thumbnail synchronization feature are affected and exploitation could lead to session hijacking, privilege escalation, backdoor injection and full compromise. This issue has been fixed in version 0.16.2.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Shaarli: DOM-based Cross-Site Scripting (XSS) in Thumbnail Synchronizer","id":"CVE-2026-48821","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Shaarli has Stored Cross-Site Scripting (XSS) via Markdown Reference Links","id":"CVE-2026-48822"},"packages":[],"prev":{"headline":"CakePHP: View::element() is missing a path containment check","id":"CVE-2026-48820"},"products":["Shaarli"],"published":"2026-06-17","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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-18","vendors":["shaarli"]},"summary":"An administrator running the thumbnail synchronizer can trigger DOM-based XSS via malicious bookmark titles, leading to session hijacking and privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-48821/"}