CVE-2026-93872Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit Action cb Parameter
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Cotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in the comments plugin EditAction. Registered users with comment write permissions can instantiate arbitrary PHP objects and potentially achieve file write or code execution through gadget chains.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-502
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cotonti Cotonti cotonti:cotonti (from the name) | from 1.0.0 through 1.0.0 | CNA record |
References
- https://github.com/Cotonti/Cotonti/issues/1894issue-tracking
- https://github.com/Cotonti/Cotonti/pull/1897patch, issue-tracking
- https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.phptechnical-description
- https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.phptechnical-description
- https://github.com/Cotonti/Cotontiproduct
- https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameterthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.