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CVE-2023-38831

RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive. The issue occurs because a ZIP archive may include a benign file (such as an ordinary .JPG file) and also a folder that has the same name as the b…

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RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive. The issue occurs because a ZIP archive may include a benign file (such as an ordinary .JPG file) and also a folder that has the same name as the benign file, and the contents of the folder (which may include executable content) are processed during an attempt to access only the benign file. This was exploited in the wild in April through October 2023.
CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.7/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.8: +1.17
  • Fresh EPSS: 99.81%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 21 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

The Hacker News
Press · 11 Aug 2025, 07:00 · WinRAR Zero-Day Under Active Exploitation – Update to Latest Version Immediately - The Hacker News
The Hacker News
Press · 22 Nov 2024, 08:00 · APT-K-47 Uses Hajj-Themed Lures to Deliver Advanced Asyncshell Malware - The Hacker News
The Hacker News
Press · 03 Sep 2024, 07:00 · Hacktivists Exploits WinRAR Vulnerability in Attacks Against Russia and Belarus - The Hacker News
The Hacker News
Press · 23 Apr 2024, 07:00 · Russia's APT28 Exploited Windows Print Spooler Flaw to Deploy 'GooseEgg' Malware - The Hacker News
www.trendmicro.com
Press · 13 Feb 2024, 08:00 · CVE-2024-21412: Water Hydra Targets Traders with Microsoft Defender SmartScreen Zero-Day - www.trendmicro.com
See all 21 source documents
The Hacker News
Press · 22 Dec 2023, 08:00 · UAC-0099 Using WinRAR Exploit to Target Ukrainian Firms with LONEPAGE Malware - The Hacker News
Infosecurity Magazine
Press · 05 Dec 2023, 08:00 · Russian APT28 Exploits Outlook Bug to Access Exchange - Infosecurity Magazine
The Hacker News
Press · 16 Nov 2023, 08:00 · Experts Uncover DarkCasino: New Emerging APT Threat Exploiting WinRAR Flaw - The Hacker News
Trellix
Press · 09 Nov 2023, 08:00 · CVE-2023-38831: Navigating the Threat Landscape of the Latest Security Vulnerability - Trellix
blog.google
Press · 18 Oct 2023, 07:00 · Government-backed actors exploiting WinRAR vulnerability - blog.google
The Record from Recorded Future News
Press · 18 Oct 2023, 07:00 · Russia and China-linked hackers exploit WinRAR bug - The Record from Recorded Future News
BleepingComputer
Press · 18 Oct 2023, 07:00 · Google links WinRAR exploitation to Russian, Chinese state hackers - BleepingComputer
McAfee
Press · 19 Sep 2023, 07:00 · Exploring Winrar Vulnerability (CVE-2023-38831) - McAfee
The Hacker News
Press · 06 Sep 2023, 07:00 · Ukraine's CERT Thwarts APT28's Cyberattack on Critical Energy Infrastructure - The Hacker News
The Hacker News
Press · 24 Aug 2023, 07:00 · WinRAR Security Flaw Exploited in Zero-Day Attacks to Target Traders - The Hacker News
SecurityWeek
Press · 24 Aug 2023, 07:00 · Traders Targeted by Cybercriminals in Attack Exploiting WinRAR Zero-Day - SecurityWeek
BleepingComputer
Press · 23 Aug 2023, 07:00 · WinRAR zero-day exploited since April to hack trading accounts - BleepingComputer
TechCrunch
Press · 23 Aug 2023, 07:00 · Hackers exploit WinRAR zero-day bug to steal funds from broker accounts - TechCrunch
Help Net Security
Press · 23 Aug 2023, 07:00 · Attackers exploited WinRAR zero-day for months to steal money from brokers (CVE-2023-38831) - Help Net Security
Group-IB
Press · 23 Aug 2023, 07:00 · Traders' dollars in danger: CVE-2023-38831 zero-day vulnerability in WinRAR exploited by cybercriminals to target traders - Group-IB
Microsoft
Press · 24 Mar 2023, 07:00 · Guidance for investigating attacks using CVE-2023-23397 - Microsoft

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.7 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

19

Public exploit entries / repo candidates

See 19 repos with metrics
RepositoryStarsForksLanguageUpdated
Garck3h/cve-2023-3883112620Go27 Aug 2023, 14:35
BoredHackerBlog/winrar_CVE-2023-38831_lazy_poc9116—24 Aug 2023, 16:13
HDCE-inc/CVE-2023-388318914Python04 Aug 2024, 01:00
MorDavid/CVE-2023-38831-Winrar-Exploit-Generator-POC145Python31 Aug 2023, 15:07
ahmed-fa7im/CVE-2023-38831-winrar-expoit-simple-Poc111Python28 Aug 2023, 23:51
UnHackerEnCapital/PDFernetRemotelo60Python20 Jun 2024, 00:02
z3r0sw0rd/CVE-2023-38831-PoC60Python01 Sep 2023, 07:37
malvika-thakur/CVE-2023-3883142Python21 Sep 2023, 09:30
ameerpornillos/CVE-2023-38831-WinRAR-Exploit30Python12 Sep 2023, 16:26
kuyrathdaro/cve-2023-3883130Python07 Jun 2025, 19:08
RonF98/CVE-2023-38831-POC30Python08 Mar 2026, 19:22
r1yaz/winDED20Python28 Dec 2023, 18:48
s4m98/winrar-cve-2023-38831-poc-gen10Python07 Nov 2023, 05:24
SpamixOfficial/CVE-2023-3883110Rust20 Dec 2023, 11:24
thegr1ffyn/CVE-2023-3883110Python29 Aug 2023, 06:36
FirFirdaus/CVE-2023-3883100—31 Aug 2024, 08:33
khanhtranngoccva/cve-2023-38831-poc00TypeScript16 Jul 2024, 13:54
ML-K-eng/CVE-2023-38831-Exploit-and-Detection00Python29 Aug 2023, 16:15
MyStuffYT/CVE-2023-38831-POC00Python01 Mar 2024, 20:54
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.8; EPSS 99.8%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, no prior privileges, user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:57.142227+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
24 Mar 2023, 07:00
Published
23 Aug 2023, 00:00
Added to the CISA KEV catalog
24 Aug 2023, 00:00
Latest press mention
11 Aug 2025, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
19 repositories