CVE-2026-54682

HighCVSS 8.2

Published: 21/08/2026(UTC)Updated: 25/08/2026(UTC)Translated: 22/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.14%

3th percentile - higher than 3% of all known CVEs

Summary

DiscordChatExporter before version 2.47.2 saves Discord chat logs to a file. HTML exports generated with markdown formatting disabled pass attacker-controlled content through FormatMarkdownAsync and FormatEmbedMarkdownAsync without HTML entity encoding. Fields such as message.Content, embed.Title, embed.Description, field.Name, and field.Value can contain a script payload that executes when the exported HTML is opened.

Risk Assessment

An attacker can inject a malicious script that executes in the context of the user opening the export, allowing reading of export data or altering displayed content.

Recommendation

Upgrade DiscordChatExporter to version 2.47.2 or later, which includes the fix.

Other vulnerabilities in DiscordChatExporter

CVE-2026-54681Medium
DiscordChatExporter before 2.47.2 saves Discord chat logs to a file. 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.

Original NVD description (English source)

DiscordChatExporter 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.