{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47870 exists.","fix":"No fix has been published for CVE-2021-47870 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47870 is a medium-severity cross-site scripting vulnerability in GetSimple CMS My SMTP Contact Plugin, published on 21 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-47870 and fix it if it is affected.\n\nWhat it is: CVE-2021-47870 is a medium-severity cross-site scripting vulnerability in GetSimple CMS My SMTP Contact Plugin, published on 21 Jan 2026. Any signed-in user can exploit it over the network, 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-2021-47870 exists.\n\nAffected product: GetSimple CMS My SMTP Contact 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-2021-47870/ (Markdown: https://insights.sbomify.com/CVE-2021-47870/index.md)","id":"CVE-2021-47870","markdown":"https://insights.sbomify.com/CVE-2021-47870/index.md","name":"CVE-2021-47870","record":{"aliases":["GHSA-xcf5-jfw6-6364"],"analysis":{"component_type":"cms_plugin","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"GetSimple CMS plugin","requires_auth":"low_privilege","summary":"Attackers can inject arbitrary client-side code into the administrator's browser via stored XSS in the My SMTP Contact plugin.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"getsimplecms","vendor":"get-simple"}],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/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":"GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS","id":"CVE-2021-47870","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":5,"next":{"headline":"Hestia Control Panel 1.3.2 - Arbitrary File Write","id":"CVE-2021-47871"},"packages":[],"prev":{"headline":"BRAdmin Professional 3.75 - 'BRA_Scheduler' Unquoted Service Path","id":"CVE-2021-47869"},"products":["My SMTP Contact Plugin"],"published":"2026-01-21","related":[{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2023-46042","kev_date_added":null,"published":"2023-10-19"},{"cvss_score":9.1,"headline":"Path traversal in n/a","id":"CVE-2020-18191","kev_date_added":null,"published":"2020-10-02"},{"cvss_score":8.7,"headline":"GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload","id":"CVE-2013-10032","kev_date_added":null,"published":"2025-07-25"},{"cvss_score":8.6,"headline":"GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection","id":"CVE-2021-47778","kev_date_added":null,"published":"2026-01-21"},{"cvss_score":8.5,"headline":"GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE","id":"CVE-2021-47860","kev_date_added":null,"published":"2026-01-21"},{"cvss_score":7.2,"headline":"File upload in n/a","id":"CVE-2021-28976","kev_date_added":null,"published":"2021-06-23"},{"cvss_score":6.9,"headline":"GetSimpleCMS profile.php cross-site request forgery","id":"CVE-2024-11125","kev_date_added":null,"published":"2024-11-12"}],"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-12","vendors":["GetSimple CMS"]},"summary":"Attackers can inject arbitrary client-side code into the administrator's browser via stored XSS in the My SMTP Contact plugin.","url":"https://insights.sbomify.com/CVE-2021-47870/"}