DiscordChatExporter: Stored XSS in HTML export when markdown formatting is disabled

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54682
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 19:17:03 UTC
Updated2026-08-21 19:17:03 UTC
DescriptionDiscordChatExporter saves Discord chat logs to a file. Prior to 2.47.2, HTML exports generated with markdown formatting disabled pass attacker-controlled content through FormatMarkdownAsync and FormatEmbedMarkdownAsync in DiscordChatExporter.Core/Exporting/MessageGroupTemplate.cshtml and render it without HTML entity encoding. The affected fields include message.Content, message.ForwardedMessage.Content, message.ReferencedMessage.Content, embed.Title, embed.Description, field.Name, and field.Value. A Discord webhook or bot can store a script payload in these fields, and the payload executes when a user exports the channel with markdown formatting disabled and opens the resulting HTML, allowing the script to read the export or alter its displayed content. This issue is fixed in version 2.47.2.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/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]Secondary8.2HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tyrrrz DiscordChatExporter affected < 2.47.2 Not specified

References

ReferenceSourceLinkTags
github.com/Tyrrrz/DiscordChatExporter/pull/1545 [email protected] github.com
github.com/Tyrrrz/DiscordChatExporter/commit/5632d6c3867d2f79cba9578056c... [email protected] github.com
github.com/Tyrrrz/DiscordChatExporter/security/advisories/GHSA-8qrv-mmch... [email protected] github.com
github.com/Tyrrrz/DiscordChatExporter/releases/tag/2.47.2 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
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