CVE-2024-42008Public exploitNetwork attack vector

Email theft via unsafe inline attachment rendering

Published Aug 5, 2024 · Updated Mar 13, 2025

Cross-site scripting in Roundcube 1.5.7 and earlier and 1.6.0 through 1.6.7 allows remote attackers to steal and send email via an attachment. rcmail_action_mail_get->run() serves inline attachments using attacker-controlled MIME types, letting XML and other active content execute as same-origin script. A victim must click the attachment link; successful script execution can read mail and contacts, send messages, steal credentials, and register a persistent service worker.

CVSS severity9.3
Critical
EPSS probability35.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Roundcube 1.5.7 and earlier and 1.6.0 through 1.6.7 allows remote attackers to steal and send email via an attachment. rcmail_action_mail_get->run() serves inline attachments using attacker-controlled MIME types, letting XML and other active content execute as same-origin script. A victim must click the attachment link; successful script execution can read mail and contacts, send messages, steal credentials, and register a persistent service worker.

The record

CVE
CVE-2024-42008
Published
Aug 5, 2024
Updated
Mar 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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?

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

9.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
9.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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