CVE-2024-45621Network attack vector

Stored XSS via in-app PDF external actions

Published Sep 2, 2024 · Updated Mar 13, 2025

Stored XSS in Rocket.Chat Electron desktop through 6.3.4 allows remote authenticated users to run scripts via uploaded PDF links. The PDF external-action path keeps third-party link actions inside the Electron application rather than transferring them to a separate browser. Exploitation requires an uploaded file and recipient interaction with its crafted link, exposing data and actions available to the desktop session.

CVSS severity5.4
Medium
EPSS probability0.29%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Rocket.Chat Electron desktop through 6.3.4 allows remote authenticated users to run scripts via uploaded PDF links. The PDF external-action path keeps third-party link actions inside the Electron application rather than transferring them to a separate browser. Exploitation requires an uploaded file and recipient interaction with its crafted link, exposing data and actions available to the desktop session.

The record

CVE
CVE-2024-45621
Published
Sep 2, 2024
Updated
Mar 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2025Record 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A: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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution
T1566.002Spearphishing Link

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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