UpHeron
All vulnerabilities

Servers and applications

CVE-2023-40703

Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted string.

Severity
High 7.5
Published
27 Nov 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost
  • Every version up to 7.8.12
  • From 8.0.0 up to 8.1.3
  • From 9.0.0 up to 9.0.1
  • Version 9.1.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-40703
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-40703