Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2022-28221

CleanTalk AntiSpam <= 5.173 Reflected XSS

CleanTalk AntiSpam · 5.173 to <= 5.173

Watch CVE-2022-28221 Browse KEV feed
Severity
CVSS 6.1 · Medium
Confidence
High
Exploit status
Exploited in the wild
EPSS
2.4%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2022-28221 is an unauthenticated CleanTalk AntiSpam <= 5.173 Reflected XSS. The CleanTalk AntiSpam plugin <= 5.173 for WordPress is vulnerable to Reflected Cross-Site Scripting (XSS) via the $_REQUEST['page']...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is high. Also confirmed by third-party sources.

Who is affected?

CleanTalk AntiSpam 5.173 to <= 5.173.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

CleanTalk AntiSpam <= 5.173 Reflected XSS

The CleanTalk AntiSpam plugin <= 5.173 for WordPress is vulnerable to Reflected Cross-Site Scripting (XSS) via the $_REQUEST['page'] parameter in`/lib/Cleantalk/ApbctWP/FindSpam/ListTable/Comments.php`

CleanTalk Affected
CleanTalk AntiSpam
Through 5.173
Published
19 Apr 2022
Exploitation Reported
30 Mar 2022
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
Required

Tags

wordpress php

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

Wordfence

Recorded 30 Mar 2022

A trusted third party reported exploitation.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
Wordfence First 2022-03-30 06:11 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

6.1 Medium

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

2.4%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

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

All CVSS Scores

CVSS v3.1 6.1 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0 4.3 Medium

AV:N/AC:M/Au:N/C:N/I:P/A:N

Timeline

From disclosure to observed exploitation

  1. 20:26 UTC

    CVE published

    Vulnerability disclosed publicly

  2. 06:11 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  3. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2022-28221

Sample API response 
{
  "cve_id": "CVE-2022-28221",
  "confidence": "High",
  "cvss_score": 6.1,
  "cvss_estimated": false,
  "epss_score": 0.02396,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}