{"cve":"CVE-2021-35440","nvd":{"published":"2021-07-06T15:15:07.757","modified":"2026-06-17T03:57:30.463","status":"Modified","description":"Smashing 1.3.4 is vulnerable to Cross Site Scripting (XSS). A URL for a widget can be crafted and used to execute JavaScript on the victim's computer. The JavaScript code can then steal data available in the session/cookies depending on the user environment (e.g. if re-using internal URL's for deploying, or cookies that are very permissive) private information may be retrieved by the attacker.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/Smashing/smashing/blob/ad7325f159f89854ca4e7d94e7be9bee507b6d46/CHANGELOG.md","https://github.com/Smashing/smashing/pull/186","https://github.com/Smashing/smashing/pull/186#issuecomment-871727614","https://github.com/Smashing/smashing/blob/ad7325f159f89854ca4e7d94e7be9bee507b6d46/CHANGELOG.md","https://github.com/Smashing/smashing/pull/186"],"products":["smashing_project:smashing"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-35440","score":0.00995,"percentile":0.62676,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-254j-mmc5-qhpx","url":"https://osv.dev/vulnerability/GHSA-254j-mmc5-qhpx","summary":"Smashing Cross-site Scripting vulnerability","modified":"2024-02-16T08:19:53.512122Z","packages":[{"ecosystem":"RubyGems","name":"smashing","purl":"pkg:gem/smashing","ranges":["<1.3.5"],"fixed":["1.3.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}