CVE-2024-53847Network attack vector

Session script execution via paste sanitizer bypass

Published Dec 9, 2024 · Updated Dec 10, 2024

Cross-site scripting in 37signals Trix 1.0.0 through 1.3.2 and 2.0.0 through 2.1.8 allows remote attackers to run JavaScript via pasted HTML. HTMLSanitizer leaves crafted MathML and embed mutation payloads executable after browser parsing instead of sanitizing the normalized DOM. Exploitation requires a user to paste attacker-controlled content into an editor, enabling unauthorized actions or data access within that user's session.

CVSS severity5.1
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in 37signals Trix 1.0.0 through 1.3.2 and 2.0.0 through 2.1.8 allows remote attackers to run JavaScript via pasted HTML. HTMLSanitizer leaves crafted MathML and embed mutation payloads executable after browser parsing instead of sanitizing the normalized DOM. Exploitation requires a user to paste attacker-controlled content into an editor, enabling unauthorized actions or data access within that user's session.

The record

CVE
CVE-2024-53847
Published
Dec 9, 2024
Updated
Dec 10, 2024
Vendor
37signals
Product
Trix
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.0.0, < 1.3.3
  2. Affected versionversion=>= 2.0.0, < 2.1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

37signals · Trixversion=>= 1.0.0, < 1.3.3; version=>= 2.0.0, < 2.1.9

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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