CVE-2023-5631
Roundcube Webmail: Persistent Cross-Site Scripting (XSS)
As of , CVE-2023-5631 in Roundcube Webmail is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 26 October 2023
- US federal deadline
- 16 November 202321 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.76Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.00 on 26 October 2023EPSS on the day CISA listed it.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- Vendor advice: roundcube.netLinks below, from CISA's entry.
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA's required action
What the flaw is
Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code.
CISA's description
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.
The CVE record's description, from ESET
- CVE published
- 18 October 2023
- Assigned by
- ESET
- CVSS
- 6.1 Medium (CVSS 3.1, from the CNA)
- CWE-79
- Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Webmail: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2025-49113Deserialization of Untrusted Data | Roundcube Webmail | Patch this weekMetasploit module; EPSS 0.99 | 0.99 | ||
| CVE-2024-42009Cross-Site Scripting | Roundcube Webmail | Patch this weekEPSS 0.83 | 0.83 | ||
| CVE-2024-37383Cross-Site Scripting (XSS) | Roundcube Webmail | Patch this weekEPSS 0.73 | 0.73 | ||
| CVE-2020-13965Cross-Site Scripting (XSS) | Roundcube Webmail | Patch this weekEPSS 0.77 | 0.77 | ||
| CVE-2023-43770Persistent Cross-Site Scripting (XSS) | Roundcube Webmail | Patch this weekEPSS 0.64 | 0.64 | ||
| CVE-2025-68461Cross-site Scripting | Roundcube Webmail | Patch soon | 0.27 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org