Irfanview
CVE-2020-35133
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V5 - File Handling File type validation, storage isolation
MITRE ATT&CK
2 techniques across 2 tactics: Command and Control, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
irfanView 4.56 contains an error processing parsing files of type .pcx. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. irfanView 4.56 contains an error processing parsing files of type .pcx. Which leads to out-of-bounds writing at i_view32+0xdb60. Affected products include: Irfanview.
Know when Irfanview gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
irfanView 4.56 contains an error processing parsing files of type .pcx. Which leads to out-of-bounds writing at i_view32+0xdb60.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.
Affected Products (CPE)NVD
Stack-based buffer overflow in the JPEG2000 plugin in IrfanView PlugIns before 4.33 allows remote attackers to execute a
Heap-based buffer overflow in jpeg_ls.dll in the Jpeg_LS (aka JLS) plugin in the formats plugins in IrfanView PlugIns be
Heap-based buffer overflow in the FlashPix PlugIn before 4.3.4.0 for IrfanView might allow remote attackers to execute a
Double free vulnerability in the Free_All_Memory function in jpeg/dectile.c in libfpx before 1.3.1-1, as used in the Fla
The WPG plugin before 3.1.0.0 for IrfanView 4.57 has a Read Access Violation on Control Flow starting at WPG!ReadWPG_W+0
In IrfanView 4.53, Data from a Faulting Address controls a subsequent Write Address starting at image00400000+0x00000000
IrfanView 4.52 has a User Mode Write AV starting at image00400000+0x00000000000249c6. Rated high severity (CVSS 7.8), th
IrfanView 4.52 has a User Mode Write AV starting at image00400000+0x0000000000013a98. Rated high severity (CVSS 7.8), th
The WPG plugin before 3.1.0.0 for IrfanView 4.57 has a user-mode write access violation starting at WPG+0x0000000000012e
Buffer overflow in IrfanView before 4.37, when a multibyte-character directory name is used, allows user-assisted remote
IrfanView B3D PlugIns before version 4.56 has a B3d.dll!+1cbf heap-based out-of-bounds write. Rated critical severity (C
IrfanView B3D PlugIns before version 4.56 has a B3d.dll!+214f heap-based out-of-bounds write. Rated critical severity (C
Exploit-DB