CVE-2026-71294Network attack vector

Authenticated database writes via unrestricted PHP deserialization

Published Aug 5, 2026 · Updated Aug 5, 2026

PHP object injection in Cotonti's Comments plugin allows remote authenticated users to write attacker-chosen rows to the cache table. CreateAction.php decodes the ci POST parameter and passes it to unserialize() without allowed_classes; EditAction.php repeats the operation for cb. Member write access to comments, enabled by default, reaches the create sink; editing a member's own comment reaches the edit sink, while code execution depends on loaded gadget chains.

CVSS severity7.6
High
EPSS probability0.22%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in Cotonti's Comments plugin allows remote authenticated users to write attacker-chosen rows to the cache table. CreateAction.php decodes the ci POST parameter and passes it to unserialize() without allowed_classes; EditAction.php repeats the operation for cb. Member write access to comments, enabled by default, reaches the create sink; editing a member's own comment reaches the edit sink, while code execution depends on loaded gadget chains.

The record

CVE
CVE-2026-71294
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Cotonti
Product
Cotonti
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cotonti · Cotontiversion=0 <=*

Published CVSS scores

7.6TuranSecCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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