CVE-2021-27288Network attack vector

Sensitive-information disclosure via stored XSS

Published Apr 14, 2021 · Updated Aug 3, 2024

Cross-site scripting in X2Engine X2CRM 7.1 allows remote attackers to obtain sensitive information via the Comment field on /profile/activity. The activity comment handler stores and renders attacker-supplied HTML or script without neutralization, causing stored script execution when the activity is viewed. Network access and a victim viewing the activity are required; the documented impact is sensitive-information disclosure with limited content manipulation and no service interruption.

CVSS severity6.1
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in X2Engine X2CRM 7.1 allows remote attackers to obtain sensitive information via the Comment field on /profile/activity. The activity comment handler stores and renders attacker-supplied HTML or script without neutralization, causing stored script execution when the activity is viewed. Network access and a victim viewing the activity are required; the documented impact is sensitive-information disclosure with limited content manipulation and no service interruption.

The record

CVE
CVE-2021-27288
Published
Apr 14, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2021CVE 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

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3[email protected]AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1[email protected]CVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo