CVE-2020-8292Public exploitNetwork attack vector

Self-XSS via message-box drag and drop

Published Jan 21, 2021 · Updated Aug 4, 2024

Self-XSS in Rocket.Chat server before 3.9.0 allows context-dependent attackers to run script through message-box drag and drop. The public record identifies the message-box drag-and-drop path but does not disclose the responsible function or exact missing validation or encoding operation. Triggering the flaw requires user interaction in an affected browser session; resulting script access is confined to that session's Rocket.Chat origin.

CVSS severity5.4
Medium
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Self-XSS in Rocket.Chat server before 3.9.0 allows context-dependent attackers to run script through message-box drag and drop. The public record identifies the message-box drag-and-drop path but does not disclose the responsible function or exact missing validation or encoding operation. Triggering the flaw requires user interaction in an affected browser session; resulting script access is confined to that session's Rocket.Chat origin.

The record

CVE
CVE-2020-8292
Published
Jan 21, 2021
Updated
Aug 4, 2024
Vendor
Rocket.Chat Technologies Corp.
Product
Rocket.Chat
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=Fixed in 3.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rocket.Chat Technologies Corp. · Rocket.Chatversion=Fixed in 3.9.0

Published CVSS scores

5.4NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
4.3NISTAV:N/AC:M/Au:N/C:N/I:P/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 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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

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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