CVE-2024-42010
Highmod_css_styles in Roundcube through 1.5.7 and 1.6.x through 1.6.7 insufficiently filters Cascading Style Sheets (CSS) token sequences in rendered e-mail messages, allowing a remote attacker to obtain sensitive information.
Published Aug 5, 2024 · Updated Sep 17, 2026 · Also known as DEBIAN-CVE-2024-42010, UBUNTU-CVE-2024-42010, USN-8223-1
Key Facts
Patch immediately- CVE-2024-42010 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting roundcube (debian), roundcube-core (ubuntu), roundcube-mysql (ubuntu) and 4 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- Fixed versions are available, including roundcube 1.2~beta+dfsg.1-0ubuntu1+esm8, roundcube 1.3.6+dfsg.1-1ubuntu0.1~esm8, roundcube 1.4.15+dfsg.1-1+deb11u4.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2024-42010 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
mod_css_styles in Roundcube through 1.5.7 and 1.6.x through 1.6.7 insufficiently filters Cascading Style Sheets (CSS) token sequences in rendered e-mail messages, allowing a remote attacker to obtain sensitive information.
Affected Products
51 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| roundcubedebian | See advisory | 1.4.15+dfsg.1-1+deb11u4 |
| roundcube-coreubuntu | See advisory | 1.3.6+dfsg.1-1ubuntu0.1~esm8 |
| roundcube-mysqlubuntu | See advisory | 1.3.6+dfsg.1-1ubuntu0.1~esm8 |
| roundcube-pgsqlubuntu | See advisory | 1.3.6+dfsg.1-1ubuntu0.1~esm8 |
| roundcube-pluginsubuntu | See advisory | 1.3.6+dfsg.1-1ubuntu0.1~esm8 |
Patched Releases
roundcube
1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.4.15+dfsg.1-1+deb11u4, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.5+dfsg-1+deb12u3, 1.6.6+dfsg-2ubuntu0.1+esm3, 1.6.8+dfsg-1
roundcube-core
1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.6+dfsg-2ubuntu0.1+esm3
roundcube-mysql
1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.6+dfsg-2ubuntu0.1+esm3
roundcube-pgsql
1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.6+dfsg-2ubuntu0.1+esm3
roundcube-plugins
1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.6+dfsg-2ubuntu0.1+esm3
roundcube-sqlite3
1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.6+dfsg-2ubuntu0.1+esm3
roundcubemail
1.6.8-1.1, 1.6.8-bp156.2.3.1
Timeline
Publicly disclosed
Aug 5, 2024
Last updated
Sep 17, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42010.json
- advisoryhttps://github.com/roundcube/roundcubemail/commit/602d0f566eb39b6dcb739ad78323ec434a3b92ce
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2024-42010
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2024-42010
- advisoryhttps://ubuntu.com/security/CVE-2024-42010
FAQ
Common Questions.
mod_css_styles in Roundcube through 1.5.7 and 1.6.x through 1.6.7 insufficiently filters Cascading Style Sheets (CSS) token sequences in rendered e-mail messages, allowing a remote attacker to obtain sensitive information.
Affected: roundcube (debian); roundcube-core (ubuntu); roundcube-mysql (ubuntu), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including roundcube 1.2~beta+dfsg.1-0ubuntu1+esm8, roundcube 1.3.6+dfsg.1-1ubuntu0.1~esm8, roundcube 1.4.15+dfsg.1-1+deb11u4.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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