CVE-2023-5631

criticalknown exploitedcovered by 1 sourcefirst seen 2023-10-26

Actively exploited. CVE-2023-5631 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-10-26) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code.

CSIRTS triage

What: Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code.
Who is affected: Deployments of Roundcube Webmail.
Urgency: Remediation is urgent due to active exploitation and critical severity.
Action: Update to the latest version to mitigate the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2023-5631: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerabilitycisa-kev · 2023-10-26

External references

NVD record for CVE-2023-5631

CVE.org record

CISA KEV catalog

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