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CVE-2023-45847

21
FAUCET Score

CVE-2023-45847 describes a denial-of-service vulnerability in Mattermost Playbooks, affecting Mattermost Server. The flaw stems from a lack of length validation when setting a run checklist title, allowing an unauthenticated attacker to send a specially crafted request and crash the Playbooks plugin. This vulnerability is rated High severity (CVSS 7.5), indicating it can be exploited remotely with low complexity and without user interaction, leading to high availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 8.1.5CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 0, <= 9.0.3CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 0, <= 9.1.2CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 0, <= 9.2.1CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
<= 7.8.14CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.65%
Probability of exploitation in next 30 days
EPSS Percentile
47.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0065 is in the 24th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mattermost.com / security-updates
Issue TrackingVendor Advisory