CVE-2023-5631
Stored XSS vulnerability in Roundcube
Exploited in the wild. In CISA KEV since 2023‑10‑26. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- RoundcubemailAffected: ≥ 1.6.0, < 1.6.3Upgrade to: 1.6.3Affected: ≥ 1.5.0, < 1.5.4Upgrade to: 1.5.4Affected: ≥ 1.4.0, < 1.5.14Upgrade to: 1.5.14Fixed builds1.6.4, 1.5.5, 1.5.15Stated by: CVE record
- Roundcube WebmailAffected: < 1.4.15Upgrade to: 1.4.15Stated by: NVD
- Сообщество свободного программного обеспечения Debian GNU/LinuxAffected: 10Upgrade to: not statedStated by: BDU
- ООО «Ред Софт» РЕД ОСAffected: 7.3Upgrade to: not statedStated by: BDU
- The RoundCube Team RoundCube WebmailAffected: до 1.4.15Upgrade to: not statedStated by: BDU
Versions as the sources state them. Full version matrix after sign-in
Coverage timeline
0 publishersAdded to CISA KEV catalog
Sourced from public security reporting — each date is when it was published, not when it happened. 1 further article named this CVE in wider roundups without reporting it as a distinct event.
What it is
From the CVE record
Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker to load arbitrary JavaScript code.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2023-10-26.
US federal agencies must remediate by 2023-11-16.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Public exploits
0 sources with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
76% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
7 events over 981 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- Added to CISA KEV
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Scored 6.1 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity LowData modification is possible but limited in scope or consequence
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- roundcube.net/news/2023/10/16/security-update-1.6.4-released&
- roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15&
- debian.org/security/2023/dsa-5531&
And 22 more references. See all after sign-in
In the news
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We'll flag the next CVE, public exploit or patch for RoundCube Webmail, not every advisory. This one: actively exploited.
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