CVE-2026-0677Network attack vector

Authenticated object injection via undisclosed deserialization locus

Published Mar 20, 2026 · Updated Mar 20, 2026

PHP object injection in TotalSuite TotalContest Lite 2.9.1 and earlier allows remote authenticated users to instantiate arbitrary objects. Patchstack has not disclosed the affected function, input field, or operation that passes attacker-controlled data into PHP deserialization. Author-level access is required, and further impact requires a usable POP chain in the WordPress installation.

CVSS severity7.2
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in TotalSuite TotalContest Lite 2.9.1 and earlier allows remote authenticated users to instantiate arbitrary objects. Patchstack has not disclosed the affected function, input field, or operation that passes attacker-controlled data into PHP deserialization. Author-level access is required, and further impact requires a usable POP chain in the WordPress installation.

The record

CVE
CVE-2026-0677
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
TotalSuite
Product
TotalContest
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 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=n/a <=2.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TotalSuite · TotalContestversion=n/a <=2.9.1

Published CVSS scores

6.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
7.2PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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