CVE-2022-3934Public exploitNetwork attack vector

Administrator-session script execution via unescaped block identifiers

Published Dec 12, 2022 · Updated Apr 22, 2025

Reflected XSS in FlatPM before 3.0.13 allows remote attackers to execute scripts in an administrator's browser through a crafted link. The blocks_form administration page writes the block_id parameter into HTML without sanitization or output escaping; builds before 2.662 also mishandle block_cat_ID. An administrator must be logged in and open the crafted URL, allowing script execution in that administrator's browser session.

CVSS severity5.4
Medium
EPSS probability0.87%
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 FlatPM before 3.0.13 allows remote attackers to execute scripts in an administrator's browser through a crafted link. The blocks_form administration page writes the block_id parameter into HTML without sanitization or output escaping; builds before 2.662 also mishandle block_cat_ID. An administrator must be logged in and open the crafted URL, allowing script execution in that administrator's browser session.

The record

CVE
CVE-2022-3934
Published
Dec 12, 2022
Updated
Apr 22, 2025
Vendor
Mikhail Flat
Product
FlatPM – Ad Manager, AdSense and Custom Code
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record 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=0 <3.0.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mikhail Flat · FlatPM – Ad Manager, AdSense and Custom Codeversion=0 <3.0.13

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.1WordfenceCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Cross-Site Scripting (XSS)
T1204.001User Execution: Malicious 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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