4.3

CVE-2023-47858: Details of archived public channels are leaked to members of another team

Modified
AliasesGHSA-w88v-pjr8-cmv2BIT-mattermost-2023-47858GO-2024-2450
Published 02-01-2024Last modified 17-06-2025

Vulnerability summary

CVE-2023-47858 is a medium (CVSS 4.3) Improper Access Control vulnerability in mattermost. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 29.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.36%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 7
CGA-2G4P-XJM7-MQ6HCGA-4M9J-264V-7MR3CGA-846J-G95C-FQPGCGA-8CHV-GP3C-W92MCGA-8Q9W-C43Q-6CW6CGA-QG72-5WH7-HVWR

Timeline

  1. 02-01-2024
    PublishedVulnerability first disclosed.
  2. 17-06-2025
    Last modifiedVulnerability information updated.

Description

Mattermost fails to properly verify the permissions needed for viewing archived public channels,  allowing a member of one team to get details about the archived public channels of another team via the GET /api/v4/teams/<team-id>/channels/deleted endpoint.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.36% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • mattermost-fips-10.5All versions (No fix recorded)
  • mattermost-fips-10.5-compatAll versions (No fix recorded)
Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6< 7.8.10 | All versions (No fix recorded)
Mattermost2 products
  • mattermost≤ 9.2.2 | ≤ 9.1.3 | ≤ 9.0.4 | ≤ 8.1.6
  • mattermost_server< 8.1.7 | ≥ 9.0.0, < 9.0.5 | ≥ 9.1.0, < 9.1.4 | ≥ 9.2.0, < 9.2.3
Github.com/mattermost1 product
  • mattermost-serverAll versions (No fix recorded)
Github.com/mattermost/mattermost/server1 product
  • v8< 8.1.1 | All versions (No fix recorded)

5 vendors · 8 products

References

5 links