Description
Spacebar Server before commit 8d126f4 contains a cross-channel message deletion vulnerability in the single-delete and bulk-delete message handlers that fail to scope message queries to the requested channel. Authenticated users with MANAGE_MESSAGES permission in any controlled channel can delete arbitrary messages in other channels by routing delete requests through their own channel.
References5
- github.com/spacebarchat/server/commit/8d126f401914d68fa8a97f7e5…
- github.com/spacebarchat/server/issues/1685
- github.com/spacebarchat/server/security/advisories/GHSA-62g6-28…
- www.vulncheck.com/advisories/spacebar-server-cross-channel-mess…
- github.com/spacebarchat/server/security/advisories/GHSA-62g6-28…
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - CVSS 4.0
-
7.1
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 33 · as of 12 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
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