CVE-2024-42008VulnerabilityPublished 5 Aug 2024Updated 30 Apr 2026

rcmail_action_mail_get->run() · Cross-Site Scripting Vulnerability

Affects roundcubeSource GCVE Database

Not known to be exploited · CVSS 9.3 Critical · fixed in 1.5.0+dfsg.1-2ubuntu0.1~esm6 : patch roundcube as a priority.

Data as of 27 Oct 2026, 00:17 UTC

CVSS 3.1 base score

9.3Critical

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.6+dfsg-2ubuntu0.1+esm3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Aug 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade the Ubuntu roundcube to 1.5.0+dfsg.1-2ubuntu0.1~esm6 (package) or 1.6.6+dfsg-2ubuntu0.1+esm3 (package).

Patches and advisories

ubuntu.com/security/notices/USN-8223-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu Pro 24.04 LTSroundcube`pkg:deb/ubuntu/roundcube?arch=source&distro=esm-apps/noble`Other threats	Affected <1.6.6+dfsg-2ubuntu0.1+esm3	Fixed in 1.6.6+dfsg-2ubuntu0.1+esm3
Ubuntu Pro 22.04 LTSroundcube`pkg:deb/ubuntu/roundcube?arch=source&distro=esm-apps/jammy`Other threats	Affected <1.5.0+dfsg.1-2ubuntu0.1~esm6	Fixed in 1.5.0+dfsg.1-2ubuntu0.1~esm6

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the official security updates provided by Ubuntu as detailed in advisory USN-8223-1. The fixed package versions include 1.5.0+dfsg.1-2ubuntu0.1~esm6 and 1.6.6+dfsg-2ubuntu0.1+esm3. Standard system updates will apply these fixes. No additional mitigation is required once patched.

Description

A critical Cross-Site Scripting (XSS) vulnerability exists in the rcmail_action_mail_get->run() function of Roundcube Webmail versions through 1.5.7 and 1.6.x through 1.6.7. This flaw allows a remote attacker to exploit a malicious email attachment with a crafted Content-Type header to steal and send emails from a victim's account. The vulnerability has a high CVSS score of 9.3 and affects multiple Ubuntu package versions. Official patches are available from Ubuntu to remediate this issue.

Impact

Successful exploitation allows remote attackers to perform cross-site scripting attacks via malicious email attachments, potentially leading to theft and unauthorized sending of emails from the victim's account. This compromises confidentiality and integrity of email communications but does not affect availability. The vulnerability can be triggered without privileges and requires user interaction (UI:R).

References

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