{"cve":"CVE-2026-54503","nvd":{"published":"2026-09-15T17:17:21.060","modified":"2026-09-30T17:43:24.057","status":"Awaiting Analysis","description":"plone.app.textfield provides a zope.schema-style field type called RichText for storing a value with a related MIME type. Prior to 2.0.2, 3.0.2, and 4.0.1, depending on the release line, RichTextValue.output returns an unsanitized stored RichText value when mimeType equals outputMimeType, including values that claim the text/x-html-safe output type. This equality shortcut bypasses the safe_html transform even though the transform itself correctly removes event-handler attributes and unsafe URI schemes. Equal types can result from a RichText field configured with the same mimeType and outputMimeType or from REST API input that supplies text/x-html-safe as its content type. The raw stored value is then emitted through tal:content=structure without escaping, allowing a user who can set a RichText field to store JavaScript that executes in a viewer's browser. This issue is fixed in versions 2.0.2, 3.0.2, and 4.0.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-80"],"references":["https://github.com/plone/plone.app.textfield/commit/0da1aeec2406cf640977eb857a03e792d2c7cac2","https://github.com/plone/plone.app.textfield/commit/467638e500d804c637031387a227a2b02d12a86f","https://github.com/plone/plone.app.textfield/commit/781d517a38524087fe57525a94806684908f852f","https://github.com/plone/plone.app.textfield/security/advisories/GHSA-4r4f-gg25-rmg5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-54503","score":0.004,"percentile":0.34026,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-4r4f-gg25-rmg5","url":"https://osv.dev/vulnerability/GHSA-4r4f-gg25-rmg5","summary":"plone.app.textfield: Stored XSS by spoofing mime type ","modified":"2026-07-23T15:11:23.384785972Z","packages":[{"ecosystem":"PyPI","name":"plone-app-textfield","purl":"pkg:pypi/plone-app-textfield","ranges":["<2.0.2"],"fixed":["2.0.2"]},{"ecosystem":"PyPI","name":"plone-app-textfield","purl":"pkg:pypi/plone-app-textfield","ranges":[">=3.0.0 <3.0.2"],"fixed":["3.0.2"]},{"ecosystem":"PyPI","name":"plone-app-textfield","purl":"pkg:pypi/plone-app-textfield","ranges":[">=4.0.0 <4.0.1"],"fixed":["4.0.1"]}]},{"id":"PYSEC-2026-3497","url":"https://osv.dev/vulnerability/PYSEC-2026-3497","summary":"plone.app.textfield: Stored XSS by spoofing mime type ","modified":"2026-07-23T15:00:19.411920440Z","packages":[{"ecosystem":"PyPI","name":"plone-app-textfield","purl":"pkg:pypi/plone-app-textfield","ranges":["<2.0.2",">=3.0.0 <3.0.2",">=4.0.0 <4.0.1"],"fixed":["2.0.2","3.0.2","4.0.1"]}]}],"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."]}