{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-20840 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20840 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20840 is a medium-severity cross-site scripting vulnerability in Saasproject Booking Package - Appointment Booking Calendar System, published on 24 Nov 2021. 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-2021-20840 and fix it if it is affected.\n\nWhat it is: CVE-2021-20840 is a medium-severity cross-site scripting vulnerability in Saasproject Booking Package - Appointment Booking Calendar System, published on 24 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-20840 in the wild and no public exploit code.\n\nAffected product: Saasproject Booking Package - Appointment Booking Calendar System. 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-2021-20840/ (Markdown: https://insights.sbomify.com/CVE-2021-20840/index.md)","id":"CVE-2021-20840","markdown":"https://insights.sbomify.com/CVE-2021-20840/index.md","name":"CVE-2021-20840","record":{"aliases":["GHSA-6wcx-352r-rcj5"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Booking Calendar System","requires_auth":"none","summary":"Remote attackers can inject arbitrary scripts into the Booking Package appointment system, potentially compromising user sessions or data.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"booking_package","vendor":"saasproject"}],"cvss":{"score":6.1,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cross-site scripting in Booking Package - Appointment Booking Calendar System","id":"CVE-2021-20840","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"EC-CUBE Improper access control in Management screen","id":"CVE-2021-20841"},"packages":[],"prev":{"headline":"XML external entity in Office Server Document Converter","id":"CVE-2021-20839"},"products":["Booking Package - Appointment Booking Calendar System"],"published":"2021-11-24","related":[{"cvss_score":7.5,"headline":"Booking Package \u003c 1.5.29 - Unauthenticated Sensitive Data Disclosure","id":"CVE-2022-0709","kev_date_added":null,"published":"2022-04-04"},{"cvss_score":7.1,"headline":"WordPress Booking Package Plugin \u003c= 1.6.01 is vulnerable to Cross Site Scripting (XSS)","id":"CVE-2023-39918","kev_date_added":null,"published":"2023-09-04"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["Saasproject"]},"summary":"Remote attackers can inject arbitrary scripts into the Booking Package appointment system, potentially compromising user sessions or data.","url":"https://insights.sbomify.com/CVE-2021-20840/"}