medium Known exploitedREV. 01
CVE-2023-5631Roundcube — a drawing in mail that carries script
Roundcube's markup cleaner lets a crafted drawing inside a formatted message through, so script in the message runs when the reader opens it and stays in the mailbox. Fixed in 1.4.15, 1.5.5 and 1.6.4.
Read the risk
THE VITAL STATS- CVSS score
- 5.4/ 10 CVSS v3.1
- EPSS probability
- 76% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2023-10-18
- Added to KEV
- 2023-10-26
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- execution
- MITRE ATT&CK
- T1059.007
- Severity
- medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attacker needsThe victim must open the message.
Fixed inRoundcube >= 1.4.15, Roundcube >= 1.5.5, Roundcube >= 1.6.4
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisorybugs.debian.orgbugs.debian.org
- 04Vendor advisorygithub.comgithub.com
- 05Vendor advisorygithub.comgithub.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added | cisa.gov | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-09-24 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.