{"id":"CVE-2020-15138","aliases":["CLSA-2026-1793304056","DEBIAN-CVE-2020-15138","EUVD-2020-0649","GHSA-wvhm-4hhf-97x9","ROOT-APP-NPM-CVE-2020-15138","UBUNTU-CVE-2020-15138"],"status":"published","title":"Cross-Site Scripting in Prism","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.02041,"percentile":0.81318,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2020-08-07T16:30:14Z","modified":"2026-10-30T02:15:07Z","fixes":[{"ecosystem":"npm","package":"prismjs","fixed_in":["1.21.0"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"node-prismjs","fixed_in":["1.11.0+dfsg-4"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-prismjs","fixed_in":["1.11.0+dfsg-4"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-prismjs","fixed_in":["1.11.0+dfsg-4"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"prismjs","fixed_in":["1.17.1-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/prismjs","fixed_in":["1.17.1-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.0"},{"fixed":"1.21.0"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.17.1-tuxcare.0"},{"fixed":"1.17.1-tuxcare.1"}]}],"versions":["1.17.1"],"bundled":6},{"source":"osv","ecosystem":"Debian:12","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.0+dfsg-4"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.0+dfsg-4"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.0+dfsg-4"}]}]},{"source":"osv","ecosystem":"npm","package":"prismjs","ranges":[{"type":"SEMVER","events":[{"introduced":"1.1.0"},{"fixed":"1.21.0"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1-root.io.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11.0+dfsg-2","1.11.0+dfsg-3"]}],"products":[{"vendor":"prismjs","product":"previewers"},{"vendor":"prismjs","product":"prism"}],"references":[{"url":"https://github.com/PrismJS/prism/security/advisories/GHSA-wvhm-4hhf-97x9","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web","report"]},{"url":"https://prismjs.com/plugins/previewers/#disabling-a-previewer","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","web","report"]},{"url":"https://github.com/PrismJS/prism/pull/2506/commits/7bd7de05edf71112a3a77f87901a2409c9c5c20c","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-15138","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-wvhm-4hhf-97x9"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-15138","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-15138","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-15138","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-15138","title":"Cross-Site Scripting in Prism","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","status":"published","published":"2020-08-07T16:30:14Z","modified":"2024-08-04T13:08:21.948Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:50.228781Z"}],"euvd":[{"id":"EUVD-2020-0649","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","status":"published","published":"2020-08-07T16:30:14Z","modified":"2024-08-04T13:08:21Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high"}],"updated_at":"2026-11-03T03:07:33.100327Z"}],"ghsa":[{"id":"GHSA-wvhm-4hhf-97x9","title":"Cross-Site Scripting in Prism","description":"### Impact\nThe easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer.\n\nThis impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0).\n\n### Patches\nThis problem is patched in v1.21.0.\n\n### Workarounds\nTo workaround the issue without upgrading, [disable the easing preview](https://prismjs.com/plugins/previewers/#disabling-a-previewer) on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.\n\n### References\nThe vulnerability was introduced by this [commit](https://github.com/PrismJS/prism/commit/4303c940d3d3a20e8ce7635bf23331c75060f5c5) on Sep 29, 2015 and fixed by [Masato Kinugawa](https://twitter.com/kinugawamasato) (#2506).\n\n### For more information\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/PrismJS/prism/issues).","status":"published","published":"2020-08-07T22:28:30Z","modified":"2023-01-09T05:03:59Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:36:07.581563Z"}],"nvd":[{"id":"CVE-2020-15138","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","status":"published","published":"2020-08-07T17:15:10.45Z","modified":"2026-06-17T02:56:07.577Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high","assessor":"primary"},{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:10.994748Z"}],"osv":[{"id":"CVE-2020-15138","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","status":"published","published":"2020-08-07T17:15:10.45Z","modified":"2026-10-20T10:51:53.29042468Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:44:14.418339Z"},{"id":"DEBIAN-CVE-2020-15138","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","status":"published","published":"2020-08-07T17:15:10.45Z","modified":"2026-10-26T12:02:26.583296767Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"GHSA-wvhm-4hhf-97x9","title":"Cross-Site Scripting in Prism","description":"### Impact\nThe easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer.\n\nThis impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0).\n\n### Patches\nThis problem is patched in v1.21.0.\n\n### Workarounds\nTo workaround the issue without upgrading, [disable the easing preview](https://prismjs.com/plugins/previewers/#disabling-a-previewer) on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.\n\n### References\nThe vulnerability was introduced by this [commit](https://github.com/PrismJS/prism/commit/4303c940d3d3a20e8ce7635bf23331c75060f5c5) on Sep 29, 2015 and fixed by [Masato Kinugawa](https://twitter.com/kinugawamasato) (#2506).\n\n### For more information\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/PrismJS/prism/issues).","status":"published","published":"2020-08-07T22:28:30Z","modified":"2026-07-08T06:00:45.631865969Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:59.131095Z"},{"id":"UBUNTU-CVE-2020-15138","description":"Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism \u003e=v1.1.0 that use the _Previewers_ plugin (\u003e=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.","status":"published","published":"2020-08-07T17:15:00Z","modified":"2025-10-24T04:48:35Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:54:23.344108Z"},{"id":"CLSA-2026-1793304056","title":"TuxCare security update for prismjs (6 CVEs)","description":"TuxCare rebuilt prismjs to address 6 CVEs. Fixed in 1.17.1-tuxcare.1.","status":"published","published":"2026-10-29T21:00:57Z","modified":"2026-10-30T02:15:07.694579967Z","updated_at":"2026-11-02T15:43:55.669514Z"},{"id":"ROOT-APP-NPM-CVE-2020-15138","title":"CVE-2020-15138 in prismjs - Patched by Root","description":"Root has patched CVE-2020-15138 in the prismjs package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-08-27T18:52:03Z","modified":"2026-08-27T19:30:04.031878031Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}