What’s Vulnerable › Vulnerabilities

CVE-2023-26131

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-05-31 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• Algernon Project Algernon: all versions

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
• 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

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