Affected versions: ≥ 5.0.0 and < 5.0.53
Full advisory: our disclosure post
CVE-2026-102785CriticalAdded to mySites.guru 21 October 2026
YOOtheme Pro (yootheme) 5.0.0 to 5.0.52 - Unauthenticated Remote Code Execution via Image Handler (Critical)
YOOtheme Pro 5.0.0 to 5.0.52 is affected by CVE-2026-102785, which YOOtheme describes in its changelog as an unauthenticated remote code execution via the image handler. The vulnerable code is the public image cache route that YOOtheme Pro uses to serve resized and cropped images, which is reachable by any visitor with no login. Fixed in YOOtheme Pro 5.0.53, released 21 October 2026. Comparing the 5.0.52 and 5.0.53 packages shows the fix: the image controller now only accepts a fixed allow-list of image operations (type, crop, resize, rotate, flip, thumbnail) instead of any method on the image object, and it now checks that the requested cache file name matches the one generated for the signed image URL, so a request can no longer choose where the generated file is written. YOOtheme Pro 4 and earlier are not affected, according to the vendor. The CVE is reserved but its record is not yet published, so no official CVSS score is available. There is no interim mitigation: take a backup and update every YOOtheme Pro 5 site to 5.0.53 or later through the Joomla Extensions manager or your YOOtheme account, then run a new snapshot to clear this alert. YOOtheme Pro installs as both a template and a system plugin, both reporting the element yootheme, so a site normally shows two rows for this; updating YOOtheme Pro updates both together.
Is my site affected?
- Affected
- YOOtheme Pro from 5.0.0 up to but not including 5.0.53
- Fixed in
- 5.0.53
- What to do
- Update YOOtheme Pro to 5.0.53 or later.
How severe CVE-2026-102785 is
The published CVE record has no CVSS score, so there is no vector to break down here. mySites.guru rates it Critical, and that is the rating your sites are checked against.
Timeline
- 21 October 2026mySites.guru check added for YOOtheme Pro (from 5.0.0 up to but not including 5.0.53)
- 21 October 2026We published: YOOtheme Pro 5.0.53 Fixes an Unauthenticated RCE: Update Every Site Now
Rule details
Our disclosure post
Other vulnerabilities in YOOtheme Pro
Updating for CVE-2026-102785 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.
YOOtheme Pro
Latest safe version: 5.0.53
- CVE-2026-76613 High, before 4.5.34
- CVE-2026-75115 High, before 4.5.34
- CVE-2026-77997 High, before 4.5.34
References
- CVE-2026-102785 on cve.org (the official CVE record)
- CVE-2026-102785 in the NIST National Vulnerability Database
- YOOtheme Pro 5.0.53 Fixes an Unauthenticated RCE: Update Every Site Now
CVE-2026-102785 questions
Which versions are affected by CVE-2026-102785?
CVE-2026-102785 affects YOOtheme Pro from 5.0.0 up to but not including 5.0.53. The fix is in 5.0.53.
How do I fix CVE-2026-102785?
Update YOOtheme Pro to 5.0.53 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-102785?
The published CVE record has no CVSS score. mySites.guru rates it Critical.
Running an affected version on a site you manage?
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This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.
Rules current as of 21 October 2026.