DiscordChatExporter: HTML attribute injection via unescaped emoji name in HTML export

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54681
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 19:17:03 UTC
Updated2026-08-21 20:16:37 UTC
DescriptionDiscordChatExporter saves Discord chat logs to a file. Prior to 2.47.2, the VisitEmojiAsync method in DiscordChatExporter.Core/Exporting/HtmlMarkdownVisitor.cs interpolates emoji.Name into the alt attribute and emoji.Code into the title attribute without HTML entity encoding. This affects HTML exports regardless of the markdown setting. Discord's current custom emoji name validation normally excludes attribute-breaking characters, but tampered offline input, a relaxed upstream validation rule, or another future metadata source can inject an HTML attribute and execute script when a user opens the export. This issue is fixed in version 2.47.2.

Risk And Classification

Primary CVSS: v3.1 4.1 MEDIUM from [email protected]

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

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.1MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED4.1MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tyrrrz DiscordChatExporter affected < 2.47.2 Not specified

References

ReferenceSourceLinkTags
github.com/Tyrrrz/DiscordChatExporter/pull/1544 [email protected] github.com
github.com/Tyrrrz/DiscordChatExporter/commit/f4d1e630f7f27120c3be4320d92... [email protected] github.com
github.com/Tyrrrz/DiscordChatExporter/security/advisories/GHSA-r7qm-wg9p... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/Tyrrrz/DiscordChatExporter/releases/tag/2.47.2 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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