CVE-2022-3272Public exploitNetwork attack vector

Service interruption via unbounded email fields

Published Sep 26, 2022 · Updated May 21, 2025

Improper input-length validation in Rdiffweb before 2.4.8 allows remote attackers to interrupt service with an oversized email value. The user-profile and user-administration forms accept arbitrarily long email strings because their WTForms validators enforce no maximum length. An unauthenticated signup can persist a million-character email, after which account actions can overload the server and interrupt availability.

CVSS severity7.5
High
EPSS probability1.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input-length validation in Rdiffweb before 2.4.8 allows remote attackers to interrupt service with an oversized email value. The user-profile and user-administration forms accept arbitrarily long email strings because their WTForms validators enforce no maximum length. An unauthenticated signup can persist a million-character email, after which account actions can overload the server and interrupt availability.

The record

CVE
CVE-2022-3272
Published
Sep 26, 2022
Updated
May 21, 2025
Vendor
IKUS Software
Product
Rdiffweb
Classifications
CWE-130, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 26, 2022CVE publishedPublication date reported by the CVE source.
  2. May 21, 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=unspecified <2.4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IKUS Software · Rdiffwebversion=unspecified <2.4.8

Published CVSS scores

5.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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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-130Improper Handling of Length Parameter Inconsistency
T1499.003Application Exhaustion Flood

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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