CVE-2026-125358
Universal-modder before e88f687 Cross-Site WebSocket Command Execution via HostLink
Description
Universal-modder before commit e88f6876745427321eb755ebc98276063a962d8a contains a missing WebSocket Origin validation vulnerability in the HostLink class of its passthrough example mods that allows remote attackers to execute Minecraft commands. Any web page open in the player's browser can connect cross-site to the unauthenticated loopback WebSocket and send cmd messages that WorldBridge.command() runs with operator authority.
INFO
Published Date :
Nov. 9, 2026, 11:27 p.m.
Last Modified :
Nov. 9, 2026, 11:27 p.m.
Remotely Exploit :
Yes !
Source :
VulnCheck
Affected Products
The following products are affected by CVE-2026-125358
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update Universal-modder to the latest version.
- Apply the commit e88f6876745427321eb755ebc98276063a962d8a.
- Ensure WebSocket origin validation is enabled.
- Restart the Universal-modder service.
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CVE-2026-125358 vulnerability anywhere in the article.