Moderate severityNVD Advisory· Published Nov 27, 2023· Updated Jun 3, 2025
Denial of Service via specially crafted block fields in Mattermost Boards
CVE-2023-40703
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | >= 9.1.0, < 9.1.1 | 9.1.1 |
github.com/mattermost/mattermost/server/v8Go | >= 9.0.0, < 9.0.2 | 9.0.2 |
github.com/mattermost/mattermost/server/v8Go | < 8.1.4 | 8.1.4 |
github.com/mattermost/mattermost-server/v6Go | < 7.8.13 | 7.8.13 |
Affected products
41- osv-coords40 versionspkg:apk/chainguard/mattermost-10.0pkg:apk/chainguard/mattermost-10.0-compatpkg:apk/chainguard/mattermost-10.1pkg:apk/chainguard/mattermost-10.1-compatpkg:apk/chainguard/mattermost-10.2pkg:apk/chainguard/mattermost-10.2-compatpkg:apk/chainguard/mattermost-10.3pkg:apk/chainguard/mattermost-10.3-compatpkg:apk/chainguard/mattermost-10.4pkg:apk/chainguard/mattermost-10.4-compatpkg:apk/chainguard/mattermost-10.5pkg:apk/chainguard/mattermost-10.5-compatpkg:apk/chainguard/mattermost-9pkg:apk/chainguard/mattermost-9.11pkg:apk/chainguard/mattermost-9.11-compatpkg:apk/chainguard/mattermost-9-compatpkg:apk/chainguard/mattermost-fips-10.5pkg:apk/chainguard/mattermost-fips-10.5-compatpkg:apk/chainguard/mattermost-fips-10.6pkg:apk/chainguard/mattermost-fips-10.6-compatpkg:apk/chainguard/mattermost-fips-10.7pkg:apk/chainguard/mattermost-fips-10.7-compatpkg:apk/chainguard/mattermost-fips-9.11pkg:apk/chainguard/mattermost-fips-9.11-compatpkg:apk/wolfi/mattermost-10.0pkg:apk/wolfi/mattermost-10.0-compatpkg:apk/wolfi/mattermost-10.1pkg:apk/wolfi/mattermost-10.1-compatpkg:apk/wolfi/mattermost-10.2pkg:apk/wolfi/mattermost-10.2-compatpkg:apk/wolfi/mattermost-10.3pkg:apk/wolfi/mattermost-10.3-compatpkg:apk/wolfi/mattermost-10.4pkg:apk/wolfi/mattermost-10.4-compatpkg:apk/wolfi/mattermost-10.5pkg:apk/wolfi/mattermost-10.5-compatpkg:apk/wolfi/mattermost-9pkg:apk/wolfi/mattermost-9-compatpkg:golang/github.com/mattermost/mattermost-server/v6pkg:golang/github.com/mattermost/mattermost/server/v8
< 0+ 39 more
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 10.7.1-r1
- (no CPE)range: < 10.7.1-r1
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 7.8.13
- (no CPE)range: >= 9.1.0, < 9.1.1
- Range: 0
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-c37r-v8jx-7cv2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2023-40703ghsaADVISORY
- mattermost.com/security-updatesghsaWEB
News mentions
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