# flarum/core (Packagist) vulnerabilities

9 known vulnerabilities (2 critical, 1 high, 5 medium, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://packagist.org/packages/flarum/core

## Advisories (9)

### [CVE-2026-41887](https://cve.now/CVE-2026-41887): Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)

- Severity: Medium 4.9
- Published: May 8, 2026
- Affected: fixed in 1.8.16; from 2.0.0-beta.1, fixed in 2.0.0-rc.1.

### [CVE-2025-27794](https://cve.now/CVE-2025-27794): Flarum Vulnerable to Session Hijacking via Authoritative Subdomain Cookie Overwrite

- Severity: Medium 6.8
- Published: Mar 12, 2025
- Affected: fixed in 1.8.10.

### [CVE-2024-21641](https://cve.now/CVE-2024-21641): Flarum's Logout Route allows open redirects

- Severity: Medium 6.5
- Published: Jan 5, 2024
- Affected: fixed in 1.8.5.

### [CVE-2023-40033](https://cve.now/CVE-2023-40033): Server-Side Request Forgery via Avatar upload in flarum

- Severity: High 7.1
- Published: Aug 16, 2023
- Affected: fixed in 1.8.0.

### [CVE-2023-27577](https://cve.now/CVE-2023-27577): Path Traversal Vulnerability in \`LESS\` Parser allows reading of sensitive server files in flarum

- Severity: Medium 6.6
- Published: Mar 10, 2023
- Affected: fixed in 1.7.0.

### [CVE-2023-22489](https://cve.now/CVE-2023-22489): Flarum is missing authorization in discussion replies

- Severity: Low 3.5
- Published: Jan 13, 2023
- Affected: from 1.3.0, fixed in 1.6.3.

### [CVE-2023-22488](https://cve.now/CVE-2023-22488): Missing authorization in Flarum

- Severity: Medium 6.8
- Published: Jan 12, 2023
- Affected: fixed in 1.6.3.

### [CVE-2022-41938](https://cve.now/CVE-2022-41938): Cross site scripting vulnerability with discussion titles in flarum

- Severity: Critical 9.0
- Published: Nov 19, 2022
- Affected: from 1.5.0, fixed in 1.6.2.

### [CVE-2021-32671](https://cve.now/CVE-2021-32671): XSS vulnerability with translator

- Severity: Critical 10.0
- Published: Jun 7, 2021
- Affected: from 1.0.0, fixed in 1.0.2.

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