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CVE-2023-2783

17
FAUCET Score

CVE-2023-2783 is a medium-severity vulnerability affecting Mattermost Apps Framework, where the system fails to verify secrets in incoming webhook requests. This flaw allows an authenticated attacker to modify the content of posts sent by Mattermost Apps. With a CVSS score of 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N), it indicates a low impact on integrity with no confidentiality or availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.8.0, <= 7.8.4CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 7.9.0, <= 7.9.3CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
7.10.0CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost:7.10.0:*:*:*:*:*:*:*

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:L/A:N

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

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
35.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 45th percentile among its peer group of 21,977 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (4)

gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-server/v6Fixed in: 7.10.1
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-server/v6Fixed in: 7.9.4
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-server/v6Fixed in: 7.8.5
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-server/v6Fixed in: 6.0.0-20230511130429-1629a6ca7fed

Vendor Advisories (1)

goGHSA-455c-vqrf-mghrmedium

Mattermost Server Missing Authorization vulnerability

Jun 16, 2023

References

mattermost.com / security-updates
Vendor Advisory