WordPress TotalContest Lite plugin <= 2.9.1 - PHP Object Injection vulnerability

published 2026-03-20 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-13657

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits: 0; none known

Deserialization of Untrusted Data vulnerability in TotalSuite TotalContest Lite totalcontest-lite allows Object Injection.This issue affects TotalContest Lite: from n/a through <= 2.9.1.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 7 mo ago (2026-03-20)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected products

TotalSuite TotalContest Lite

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/Wordpress/Plugin/totalcontest-lite/vulnerability/wordpress-totalcontest-lite-plugin-2-9-1-php-object
vdb-entry

Sources

CVE List CVE-2026-0677
NVD CVE-2026-0677

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary