CVE-2021-25016Public exploitNetwork attack vector

Reflected XSS via unescaped admin search parameter

Published Jan 3, 2022 · Updated Aug 3, 2024

Reflected XSS in Premio Chaty before 2.8.3 and Chaty Pro before 2.8.2 allows remote attackers to execute script in an administrator's browser. The admin dashboard writes the search parameter into its response without sanitization or output escaping, so supplied markup becomes executable browser content. Exploitation requires a logged-in administrator to open the crafted dashboard URL, after which script runs in that administrator's WordPress origin.

CVSS severity6.1
Medium
EPSS probability1.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Premio Chaty before 2.8.3 and Chaty Pro before 2.8.2 allows remote attackers to execute script in an administrator's browser. The admin dashboard writes the search parameter into its response without sanitization or output escaping, so supplied markup becomes executable browser content. Exploitation requires a logged-in administrator to open the crafted dashboard URL, after which script runs in that administrator's WordPress origin.

The record

CVE
CVE-2021-25016
Published
Jan 3, 2022
Updated
Aug 3, 2024
Vendor
Premio
Product
Chaty Pro
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=2.8.2 <2.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Premio · Chaty Proversion=2.8.2 <2.8.2
Premio · Chatyversion=2.8.3 <2.8.3

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 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')
T1203Exploitation for Client Execution

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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