CVE-2025-8848

Name: CVE-2025-8848
Creator: NVD / NIST
Published: 2025-10-22T14:15:52.393+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2025-8848 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.42%

33.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Librechat	Librechat	0.7.9

References

https://huntr.com/bounties/a05ebc1f-882a-4adc-b178-d3cefa4b730eExploit, Third Party Advisory

Timeline

Published: Oct 22, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-8848?

How severe is CVE-2025-8848?

CVE-2025-8848 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2025-8848?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-8848?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST