CVE-2026-54681

MediumCVSS 4.1

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

Exploitation Probability (EPSS)

Low risk

0.13%

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

Summary

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.

Risk Assessment

A user opening an HTML export may be attacked by executing a malicious script, potentially leading to data theft or session hijacking.

Recommendation

It is recommended to upgrade DiscordChatExporter to version 2.47.2 or later, which includes a fix.

Other vulnerabilities in DiscordChatExporter

CVE-2026-54682High
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.

Original NVD description (English source)

DiscordChatExporter 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.