Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Affecting flarum/framework package, versions <1.8.10


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-PHP-FLARUMFRAMEWORK-9459898
  • published17 Mar 2025
  • disclosed12 Mar 2025
  • creditUnknown

Introduced: 12 Mar 2025

NewCVE-2025-27794  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade flarum/framework to version 1.8.10 or higher.

Overview

Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') via authoritative subdomain cookie overwrite. An attacker controlling a subdomain under the parent domain can set cookies scoped to the parent domain. This allows the attacker to replace session tokens for applications hosted on sibling subdomains if session tokens aren't rotated post-authentication.

CVSS Base Scores

version 4.0
version 3.1