What is CVE-2023-2797?

CVE-2023-2797 is a low-severity vulnerability in Mattermost, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 3.1/10. Published 2023-06-16.

How severe is CVE-2023-2797?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Mattermost

CVE-2023-2797

Mattermost fails to sanitize code permalinks, allowing an attacker to preview code from private repositories by posting a specially crafted permalink on a channel.

Published 2023-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Mattermost — versions 7.10.0
Mattermost GitHub Plugin — versions 0, 7.1.10, 7.8.5

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

mattermost.com/security-updates/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-2797?: CVE-2023-2797 is a low-severity vulnerability in Mattermost, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 3.1/10. Published 2023-06-16.
How severe is CVE-2023-2797?: Low severity. CVSS v3 base score is 3.1 out of 10.