CVE-2026-93872
highCotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in the comments plugin EditAction.
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
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-09-18 20:17
Modified: 2026-09-22 20:53
NVD status: Deferred
Last synced 2 days ago
Verified against the source API 2026-10-27 06:54 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/Cotonti/Cotonti disclosure@vulncheck.com
- https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAct... disclosure@vulncheck.com
- https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php disclosure@vulncheck.com
- https://github.com/Cotonti/Cotonti/issues/1894 disclosure@vulncheck.com
- https://github.com/Cotonti/Cotonti/pull/1897 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugi... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:54 UTC · record ↗