CVE-2024-27306

MEDIUM6.1EPSS 0.71%

aiohttp Cross-site Scripting vulnerability on index pages for static file handling

Published: 4/18/2024Modified: 2/4/2026
Also known as:GHSA-7gpw-8wmc-pm8gCGA-f6p3-pww8-6mw8

Description

### Summary A XSS vulnerability exists on index pages for static file handling. ### Details When using `web.static(..., show_index=True)`, the resulting index pages do not escape file names. If users can upload files with arbitrary filenames to the static directory, the server is vulnerable to XSS attacks. ### Workaround We have always recommended using a reverse proxy server (e.g. nginx) for serving static files. Users following the recommendation are unaffected. Other users can disable `show_index` if unable to upgrade. ----- Patch: https://github.com/aio-libs/aiohttp/pull/8319/files

Affected packages (2)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1MEDIUM6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References (11)