No exploitation reportedFix available

CVE-2024-42008

Q: Is CVE-2024-42008 actively exploited?

Active exploitation of CVE-2024-42008 has not been confirmed. Its EPSS score was 34.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2024-42008?

CVE-2024-42008 has a CVSS v3 base score of 9.3 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

No exploitation reported by the sources we read.

Published2024-08-05
Fixed in1.6.8 · 1.5.8
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A Cross-Site Scripting vulnerability in rcmail_action_mail_get->run() in Roundcube through 1.5.7 and 1.6.x through 1.6.7 allows a remote attacker to steal and send emails of a victim via a malicious e-mail attachment served with a dangerous Content-Type header.

Timeline

dates in UTC

2024-08-0519:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-42008?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-42008?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Roundcube webmail

Branch	Affected	Fixed in	Source
1.6	≥ 1.6.0, < 1.6.8	1.6.8	NVD
1.5	< 1.5.8	1.5.8	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Roundcube webmail to 1.6.8 · 1.5.8

Advisories and patches

github.comRelease Notes
github.comRelease Notes
github.comRelease Notes
roundcube.netVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 3 repositories, unverifiedvictoni/Roundcube-CVE-2024-42008-and-CVE-2024-42010-POCFoxer131/CVE-2024-42008-9-exploitrpgsec/Roundcube-CVE-2024-42008-POC

Sources

CISA-ADPSSVC decisionnone2024-08-07
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.32024-08-07
NVDCVSS 3.19.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-792024-08-07
NVDweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score34.2 %2026-10-22
PoC-in-GitHubproof of concept3—
CERT-FRadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Published: 2024-08-05
Last Modified: 2026-06-17
NVD status: Modified
CERT-FR Advisory: CERTFR-2024-ALE-010
CERT-FR Link: CERTFR-2024-ALE-010

Frequently asked questions

What is CVE-2024-42008?

Is CVE-2024-42008 actively exploited?

Active exploitation of CVE-2024-42008 has not been confirmed. Its EPSS score was 34.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-42008?

CVE-2024-42008 has a CVSS v3 base score of 9.3 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

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