TimThumb <= 2.8.13 — Remote Code Execution
73776e0a-4d2a-44f9-97a2-f06055ce2c63Published · Updated Action summary
User Avatar: Affected: ≤1.4.12No patch available
WordThumb: Affected: ≤1.07No patch available
TimThumb: Affected: ≤2.8.13No patch available
What to do until a fix ships- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
User Avatar user-avatar
- Affected≤ 1.4.12
- PatchedNo fix yet
No patched version available.
You are affected if you run ≤ 1.4.12. No fixed version has been released.
WordThumb wordthumb
- Affected≤ 1.07
- PatchedNo fix yet
No patched version available.
You are affected if you run ≤ 1.07. No fixed version has been released.
TimThumb timthumb
- Affected≤ 2.8.13
- PatchedNo fix yet
No patched version available.
You are affected if you run ≤ 2.8.13. No fixed version has been released.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under User Avatar.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
- No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
- No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch User Avatar to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Pichaya Morimoto.
TimThumb 2.8.13 and WordThumb 1.07, when Webshot (aka Webshots) is enabled, allows remote attackers to execute arbitrary commands via shell metacharacters in the src parameter. Note: this is not a WordPress plugin or theme, but may be used by WordPress plugins and themes. Make sure to check for the presence of the timthumb.php file when determining if your installation is vulnerable.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in User Avatar
All 2| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.1 | Reflected Cross-Site Scripting ≤1.4.11Update to 1.4.12 | CVE-2023-46621 |
- Medium6.1Reflected Cross-Site Scripting
≤1.4.11Update to 1.4.12
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.