{"cve":"CVE-2023-26131","nvd":{"published":"2023-05-31T05:15:10.180","modified":"2026-06-17T05:42:44.783","status":"Modified","description":"All versions of the package github.com/xyproto/algernon/engine; all versions of the package github.com/xyproto/algernon/themes are vulnerable to Cross-site Scripting (XSS) via the themes.NoPage(filename, theme) function due to improper user input sanitization. Exploiting this vulnerability is possible when a file/resource is not found.","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/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/engine/handlers.go%23L512","https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/engine/handlers.go%23L514","https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/themes/html.go%23L145","https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMXYPROTOALGERNONENGINE-3312111","https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMXYPROTOALGERNONTHEMES-3312112"],"products":["algernon_project:algernon"],"source":"nvd","synced_at":"2026-10-19T21:38:24.161619714+00:00"},"epss":{"cve":"CVE-2023-26131","score":0.00691,"percentile":0.52857,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-g47h-fgcw-g4ph","url":"https://osv.dev/vulnerability/GHSA-g47h-fgcw-g4ph","summary":"Algernon engine and themes vulnerable to Cross-site Scripting","modified":"2023-11-08T04:11:59.253746Z","packages":[{"ecosystem":"Go","name":"github.com/xyproto/algernon","purl":"pkg:golang/github.com/xyproto/algernon","ranges":["<=1.15.2"],"fixed":[]}]}],"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."]}