CVE-2021-38372Public exploitNetwork attack vector

Mailbox-state tampering via pre-STARTTLS response injection

Published Aug 10, 2021 · Updated Aug 4, 2024

Response injection in KDE Trojitá 0.7 allows man-in-the-middle attackers to create fake IMAP folders through pre-STARTTLS replies. The IMAP Model.cpp pre-task handler incorporates unsolicited LIST and STATUS responses received before authentication into local mailbox state. The attacker must modify the client-server connection while STARTTLS is in use; injected folders can alter the GUI and trigger excess synchronization or a cache-blocking denial of service.

CVSS severity3.7
Low
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Response injection in KDE Trojitá 0.7 allows man-in-the-middle attackers to create fake IMAP folders through pre-STARTTLS replies. The IMAP Model.cpp pre-task handler incorporates unsolicited LIST and STATUS responses received before authentication into local mailbox state. The attacker must modify the client-server connection while STARTTLS is in use; injected folders can alter the GUI and trigger excess synchronization or a cache-blocking denial of service.

The record

CVE
CVE-2021-38372
Published
Aug 10, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/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.

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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-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1557Adversary-in-the-Middle

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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