Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter
Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads to trigger gadget chains and achieve database manipulation or code execution.
CVE-2026-91939
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-91939
Cotonti
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/Cotonti/Cotonti",
"vendor": "Cotonti",
"product": "Cotonti",
"versions": [
{
"status": "affected",
"version": "1.0.0",
"versionType": "custom",
"lessThanOrEqual": "1.0.0"
}
],
"packageURL": "pkg:composer/cotonti/cotonti",
"programFiles": [
"plugins/comments/inc/CommentsWidget.php"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-91939
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #1672 · Revision 1
- Added to Heist Feed
- Publisher date