CVE-2021-46557Public exploitNetwork attack vector

Stored XSS via unsanitized script tab input

Published Feb 15, 2022 · Updated Aug 4, 2024

Cross-site scripting in Vicidial 2.14-783a allows remote authenticated users to execute script in other users' browsers via stored input-tab data. The script-tab save path accepts crafted markup that bypasses filtering and stores it, and viewing the script causes browser execution. Login access is required, and the demonstrated consequence is execution of attacker-controlled JavaScript in a victim's session context; broader impact is not established by the public record.

CVSS severity5.4
Medium
EPSS probability0.56%
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 Vicidial 2.14-783a allows remote authenticated users to execute script in other users' browsers via stored input-tab data. The script-tab save path accepts crafted markup that bypasses filtering and stores it, and viewing the script causes browser execution. Login access is required, and the demonstrated consequence is execution of attacker-controlled JavaScript in a victim's session context; broader impact is not established by the public record.

The record

CVE
CVE-2021-46557
Published
Feb 15, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 15, 2022CVE 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?

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

3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1189Drive-by Compromise

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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