high Known exploitedREV. 01
CVE-2023-38831WinRAR — the file you opened was not the file that ran
An archive can carry a harmless-looking file and a folder with the same name, and WinRAR before 6.23 runs what is inside the folder when the user opens the file they meant to look at. Exploited from April to October 2023.
Read the risk
THE VITAL STATS- CVSS score
- 7.8/ 10 CVSS v3.1
- EPSS probability
- 98% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2023-08-23
- Added to KEV
- 2023-08-24
- Exploit published
- Yes
- Confidence
- medium
- Kill chain
- execution
- MITRE ATT&CK
- T1204.002
- Severity
- high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attacker needsThe user must open a file inside an archive the attacker supplied.
Fixed inWinRAR >= 6.23
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Exploitpacketstormsecurity.compacketstormsecurity.com
- 04Exploitblog.googleblog.google
- 05Exploitbleepingcomputer.combleepingcomputer.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.