CVE-2021-43862Public exploitNetwork attack vector

Script execution via unescaped data-text attribute

Published Dec 30, 2021 · Updated Aug 4, 2024

Cross-site scripting in jcubic jQuery Terminal before 2.31.1 allows remote authenticated users to execute script through crafted terminal input. The command-line renderer copies unescaped input into a span element's data-text attribute, allowing an injected event-handler attribute. Execution requires the host application to use execHash for URL-supplied commands and the victim to activate the injected handler; the script runs in the application's browser origin.

CVSS severity3.7
Low
EPSS probability1.04%
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 jcubic jQuery Terminal before 2.31.1 allows remote authenticated users to execute script through crafted terminal input. The command-line renderer copies unescaped input into a span element's data-text attribute, allowing an injected event-handler attribute. Execution requires the host application to use execHash for URL-supplied commands and the victim to activate the injected handler; the script runs in the application's browser origin.

The record

CVE
CVE-2021-43862
Published
Dec 30, 2021
Updated
Aug 4, 2024
Vendor
jcubic
Product
jQuery Terminal
Classifications
CWE-79, CWE-80, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 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

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=< 2.31.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

jcubic · jQuery Terminalversion=< 2.31.1

Published CVSS scores

3.7GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1204.001Malicious Link

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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