CVE-2025-8848CWE-79CWE-94cross-site-scriptingcode-injection

CVE-2025-8848

Medium · published October 22, 2025

CVSS v3.1
5.4
EPSS
0%
Percentile
38.3
In the wild
Unconfirmed
What it is

A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header. When a logged-in user sends an HTTP GET request with a crafted Accept-Language header, arbitrary HTML can be injected into the <html lang=""> tag of the response. This can lead to potential security risks such as cross-site scripting (XSS) attacks.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00453 · 38.3th percentile
Weaknesses
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'); CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2025-10-22T18:15Z
Affected products (1)
ProductVersionsFixed in
librechat/librechatall versions—
References (1)
https://huntr.com/bounties/a05ebc1f-882a-4adc-b178-d3cefa4b730e · [email protected]
EPSS history
Timeline
  • 22 OCT 13:54Z
    HTML Injection in Accept-Language Header in danny-avila/librechat
    cvelistv5