CVE-2023-43770Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior.
Updated under an hour ago ()
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It affects roundcube webmail and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Feb 12, 2024; federal agencies had to remediate by Mar 4, 2024. Treat that date as your deadline.
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Free account, 1 product
Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior.
- CVSS
- 6.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Added to CISA KEV Feb 12, 2024; federal remediation due Mar 4, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 63.66% (percentile 99)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
roundcube webmail roundcube:webmail | before 1.4.14 | CISA ADP |
debian debian_linux debian:debian_linux | 10 | CISA ADP |
roundcube webmail roundcube:webmail | before 1.4.14; from 1.5.0 before 1.5.4; from 1.6.0 before 1.6.3 | NVD |
debian debian_linux debian:debian_linux | 10.0 | NVD |
References
- https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49bpatch
- https://roundcube.net/news/2023/09/15/security-update-1.6.3-releasedrelease-notes
- https://lists.debian.org/debian-lts-announce/2023/09/msg00024.htmlmailing-list
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.