{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24876 exists.","fix":"No fix has been published for CVE-2021-24876 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-24876 is a medium-severity cross-site scripting vulnerability in Unknown Registrations for the Events Calendar – Event Registration Plugin, published on 29 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-2021-24876 and fix it if it is affected.\n\nWhat it is: CVE-2021-24876 is a medium-severity cross-site scripting vulnerability in Unknown Registrations for the Events Calendar – Event Registration Plugin, published on 29 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24876 exists.\n\nAffected product: Unknown Registrations for the Events Calendar – Event Registration Plugin. 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-2021-24876/ (Markdown: https://insights.sbomify.com/CVE-2021-24876/index.md)","id":"CVE-2021-24876","markdown":"https://insights.sbomify.com/CVE-2021-24876/index.md","name":"CVE-2021-24876","record":{"aliases":["GHSA-j464-8gjj-h5jc"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress plugin","requires_auth":"none","summary":"Attackers can execute arbitrary scripts in victim browsers via unescaped input in the Registrations for The Events Calendar plugin.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"WPScan","cpe":[{"product":"registrations_for_the_events_calendar","vendor":"roundupwp"}],"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":"The Registrations for the Events Calendar WordPress plugin before 2.7.5 does not escape the v parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2021/CVE-2021-24876.yaml","stars":null,"title":"Registrations for The Events Calendar \u003c 2.7.5 - Authenticated Reflected Cross-Site Scripting"}],"tier":"weaponised"},"has_fix":null,"headline":"Registrations for The Events Calendar \u003c 2.7.5 - Reflected Cross-Site Scripting","id":"CVE-2021-24876","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"MainWP Child \u003c 4.1.8 - Admin+ SQL Injection","id":"CVE-2021-24877"},"packages":[],"prev":{"headline":"eCommerce Product Catalog for WordPress \u003c 3.0.39 - Reflected Cross-Site Scripting","id":"CVE-2021-24875"},"products":["Registrations for the Events Calendar – Event Registration Plugin"],"published":"2021-11-29","related":[{"cvss_score":9.8,"headline":"Registrations for the Events Calendar \u003c 2.7.6 - Unauthenticated SQL Injection","id":"CVE-2021-24943","kev_date_added":null,"published":"2021-12-06"},{"cvss_score":9.6,"headline":"Registrations for The Events Calendar \u003c 2.12.4 - Unauthenticated Stored XSS","id":"CVE-2024-7982","kev_date_added":null,"published":"2024-11-08"},{"cvss_score":8.5,"headline":"WordPress Registrations for the Events Calendar plugin \u003c= 2.12.2 - SQL Injection vulnerability","id":"CVE-2024-39638","kev_date_added":null,"published":"2024-08-29"},{"cvss_score":6.1,"headline":"Registrations for The Events Calendar \u003c 2.13.4 - Admin+ Stored XSS","id":"CVE-2024-10703","kev_date_added":null,"published":"2025-03-25"},{"cvss_score":6.1,"headline":"Registrations for the Events Calendar \u003c 2.7.10 - Reflected Cross-Site Scripting","id":"CVE-2021-25083","kev_date_added":null,"published":"2022-01-24"}],"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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["Unknown"]},"summary":"Attackers can execute arbitrary scripts in victim browsers via unescaped input in the Registrations for The Events Calendar plugin.","url":"https://insights.sbomify.com/CVE-2021-24876/"}