Vulnerability in Rehan-Remade Universal-Modder
CVE-2026-125358
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.
Published .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-wjf6-3h6v-4gq9) (vendor-advisory)
- github.com/rehan-remade/universal-modder/commit/e88f6876745427321eb755ebc982760… (patch)
- github.com/rehan-remade/universal-modder/blob/edf45f6a26cb047886d9d7bcba392c328… (technical-description)
- VulnCheck Advisory: Universal-modder before e88f687 Cross-Site WebSocket Command Execution via HostLink (third-party-advisory)
Frequently asked questions
- What is CVE-2026-125358?
- CVE-2026-125358 is a high-severity vulnerability in Rehan-Remade Universal-Modder, classified under CWE-1385. CVSS score: 8.1/10. Published 2026-11-09.
- How severe is CVE-2026-125358?
- High severity. CVSS v3 base score is 8.1 out of 10.