CVE-2026-102785
CRITICAL 10Joomla Extension - yootheme.com - Unauthenticated remote code execution in YOOtheme Pro 5.0.0-5.0.52 - YOOtheme Pro’s publicly accessible image transformation handler incompletely binds normalized image operations and the output destination to its request signature. An unauthenticated remote attacker can reuse a signature disclosed in a legitimate public image URL, inject additional image operations, traverse out of the intended cache directory, and write an attacker-controlled PNG/PHP polyglot to an executable public media directory.
Severe if exploited (CVSS 10), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.7%chance of exploitation in 30 days · 53rd percentile
Impact if exploited
10CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
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Data snapshot:
Weakness (CWE)
- CWE-434: Unrestricted Upload of File with Dangerous Type
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y
References and research data (JSON)
Unverified PoC candidates
Catalogue matches for further research. These repositories have not been validated as working exploits.
2 candidates
- https://github.com/BIBILZERODAY/CVE-2026-102785---YooTheme-Mass-Exploit-Webshell.Store-PoC-in-GitHub · CVE-2026-102785
PoC-in-GitHub · CVE-2026-102785 · Updated 2026-10-22T13:36:11Z - https://github.com/antid00t/CVE-2026-102785
CVE-2026-102785 YOOtheme Pro 5.0.0-5.0.52 │ Unauthenticated RCE Mass Exploit & WAF Bypass
PoC-in-GitHub · CVE-2026-102785
PoC-in-GitHub · CVE-2026-102785 · Updated 2026-10-24T22:29:46Z
All CVSS metrics
- CRITICAL 10 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y - CRITICAL 10 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X
References
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108161 EUVD · EUVD-2026-108161
Technical & other
- https://www.yootheme.com/ CVE record · Joomla · Updated 2026-10-22T15:04:40.346Z
NVD · CVE-2026-102785 · Updated 2026-10-22T17:36:46.950