vulnerability / NVI-00004430 / Revision 4
Pimcore Hotspotimage getDataFromResource() unrestricted Serialize::unserialize over object-store column (PHP Object Injection, CWE-502)
GitHub lists this reviewed advisory for pimcore/pimcore, pimcore/pimcore. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
9.3 CRITICAL (4.0)
security-advisories@github.com severity; no combined Null risk score.
0.680%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.52419. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
pimcore/pimcore
source listed>= 2026.1.0, <= 2026.1.5
## Summary `Pimcore\Model\DataObject\ClassDefinition\Data\Hotspotimage::getDataFromResource()` deserializes the `*__hotspots` object-store column through the `Pimcore\Tool\Serialize::unserialize()` wrapper **without a class allowlist** (the wrapper's `$allowedClasses` parameter defaults to `true`, i.e. fully unrestricted). Because the persistence layer always stores this column as PHP-`serialize()`d bytes, every load of a DataObject that has a Hotspotimage (advanced image) field runs an unrestricted `unserialize()` over the stored column value. An attacker who can write the `*__hotspots` store column with crafted serialized bytes achieves PHP Object Injection (CWE-502): arbitrary classes are instantiated and their magic methods (`__wakeup`/`__destruct`) execute, which is exploitable for remote code execution via gadget chains present in Pimcore's own bundled dependencies (e.g. `guzzlehttp/guzzle`). The same field-data family also affects the sibling marshallers `ImageGallery`, `Block`, and `Video`, which use the identical `json_decode(...) ?: Serialize::unserialize(...)` fallback over their respective store columns. The root cause is shared: `Serialize::unserialize()` defaults to
pimcore/pimcore
source listed<= 12.3.9
## Summary `Pimcore\Model\DataObject\ClassDefinition\Data\Hotspotimage::getDataFromResource()` deserializes the `*__hotspots` object-store column through the `Pimcore\Tool\Serialize::unserialize()` wrapper **without a class allowlist** (the wrapper's `$allowedClasses` parameter defaults to `true`, i.e. fully unrestricted). Because the persistence layer always stores this column as PHP-`serialize()`d bytes, every load of a DataObject that has a Hotspotimage (advanced image) field runs an unrestricted `unserialize()` over the stored column value. An attacker who can write the `*__hotspots` store column with crafted serialized bytes achieves PHP Object Injection (CWE-502): arbitrary classes are instantiated and their magic methods (`__wakeup`/`__destruct`) execute, which is exploitable for remote code execution via gadget chains present in Pimcore's own bundled dependencies (e.g. `guzzlehttp/guzzle`). The same field-data family also affects the sibling marshallers `ImageGallery`, `Block`, and `Video`, which use the identical `json_decode(...) ?: Serialize::unserialize(...)` fallback over their respective store columns. The root cause is shared: `Serialize::unserialize()` defaults to
pimcore/pimcore
source listedECOSYSTEM: introduced 2026.1.0; fixed 2026.1.6
## Summary `Pimcore\Model\DataObject\ClassDefinition\Data\Hotspotimage::getDataFromResource()` deserializes the `*__hotspots` object-store column through the `Pimcore\Tool\Serialize::unserialize()` wrapper **without a class allowlist** (the wrapper's `$allowedClasses` parameter defaults to `true`, i.e. fully unrestricted). Because the persistence layer always stores this column as PHP-`serialize()`d bytes, every load of a DataObject that has a Hotspotimage (advanced image) field runs an unrestricted `unserialize()` over the stored column value. An attacker who can write the `*__hotspots` store column with crafted serialized bytes achieves PHP Object Injection (CWE-502): arbitrary classes are instantiated and their magic methods (`__wakeup`/`__destruct`) execute, which is exploitable for remote code execution via gadget chains present in Pimcore's own bundled dependencies (e.g. `guzzlehttp/guzzle`). The same field-data family also affects the sibling marshallers `ImageGallery`, `Block`, and `Video`, which use the identical `json_decode(...) ?: Serialize::unserialize(...)` fallback over their respective store columns. The root cause is shared: `Serialize::unserialize()` defaults to
pimcore/pimcore
source listedECOSYSTEM: introduced 0; fixed 12.3.10
## Summary `Pimcore\Model\DataObject\ClassDefinition\Data\Hotspotimage::getDataFromResource()` deserializes the `*__hotspots` object-store column through the `Pimcore\Tool\Serialize::unserialize()` wrapper **without a class allowlist** (the wrapper's `$allowedClasses` parameter defaults to `true`, i.e. fully unrestricted). Because the persistence layer always stores this column as PHP-`serialize()`d bytes, every load of a DataObject that has a Hotspotimage (advanced image) field runs an unrestricted `unserialize()` over the stored column value. An attacker who can write the `*__hotspots` store column with crafted serialized bytes achieves PHP Object Injection (CWE-502): arbitrary classes are instantiated and their magic methods (`__wakeup`/`__destruct`) execute, which is exploitable for remote code execution via gadget chains present in Pimcore's own bundled dependencies (e.g. `guzzlehttp/guzzle`). The same field-data family also affects the sibling marshallers `ImageGallery`, `Block`, and `Video`, which use the identical `json_decode(...) ?: Serialize::unserialize(...)` fallback over their respective store columns. The root cause is shared: `Serialize::unserialize()` defaults to
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
- vendor patch
The original advisory lists fixed boundaries 2026.1.6 for pimcore/pimcore. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 12.3.10 for pimcore/pimcore. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-w23p-wrp7-ch38 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
- GHSA-w23p-wrp7-ch38 ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2026-55220 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2026-55220 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 4 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 3 ·
Source facts changed; compare the preserved prior revision.
- Revision 2 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.