CVE-2024-9900: mudler/localai version v2.21.1 contains a Cross-Site Scripting (XSS) vulnerability in its search functionality

Routine

MEDIUM 6.1DOWNGRADE

CVE-2024-9900 is a medium-severity flaw (CVSS 6.1) affecting localai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

mudler/localai version v2.21.1 contains a Cross-Site Scripting (XSS) vulnerability in its search functionality. The vulnerability arises due to improper sanitization of user input, allowing the injection and execution of arbitrary JavaScript code. This can lead to the execution of malicious scripts in the context of the victim's browser, potentially compromising user sessions, stealing session cookies, redirecting users to malicious websites, or

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-03-20
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: mudler

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-20 10:15 UTCPublished CVE record published
2026-06-17 08:25 UTCUpdated Record last modified

mudler localai DOWNGRADE

Affected: 2.21.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.21.1

1. Check installed version

apt-cache policy localai || rpm -q localai || localai --version

2. No fixed release: DOWNGRADE to a release before 2.21.1 (Debian / Ubuntu)

apt-cache madison localai sudo apt install localai=<VERSION_BEFORE_2.21.1> sudo apt-mark hold localai

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list localai sudo dnf downgrade localai-<VERSION_BEFORE_2.21.1> sudo dnf versionlock add localai

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-9900?

localai: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-9900 being exploited?

CVE-2024-9900 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-9900 affect?

CVE-2024-9900 affects localai. Severity is medium (CVSS 6.1). mudler/localai version v2.21.1 contains a Cross-Site Scripting (XSS) vulnerability in its search functionality. The vulnerability arises due to improper sanitization of user input, allowing the injection and execution of arbitrary JavaScrip

How urgent is CVE-2024-9900?

Priority 38/100. Public exploit reference

Related CVEs

CVE-2024-7010 MEDIUM 5.9 DOWNGRADE mudler/localai version 2.17.1 is vulnerable to a Timing Attack
CVE-2024-6983 HIGH 8.8 DOWNGRADE mudler/localai version 2.17.1 is vulnerable to remote code execution
CVE-2024-6868 CRITICAL 9.8 DOWNGRADE mudler/LocalAI version 2.17.1 allows for arbitrary file write due to improper handling of automatic archive ex
CVE-2024-6095 MEDIUM 5.8 UPGRADE A vulnerability in the /models/apply endpoint of mudler/localai versions 2.15.0 allows for Server-Side Request
CVE-2024-5616 MEDIUM 4.3 UPGRADE A Cross-Site Request Forgery (CSRF) vulnerability exists in mudler/LocalAI versions up to and including 2.15.0

References

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