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CVE-2025-34113: Tiki Wiki CMS Authenticated Command Injection in Calendar Module

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-15 · updated 2026-06-17
• Weakness: CWE-20

Description

An authenticated command injection vulnerability exists in Tiki Wiki CMS versions ≤14.1, ≤12.4 LTS, ≤9.10 LTS, and ≤6.14 via the `viewmode` GET parameter in `tiki-calendar.php`. When the calendar module is enabled and an authenticated user has permission to access it, an attacker can inject and execute arbitrary PHP code. Successful exploitation leads to remote code execution in the context of the web server user.

Affected products

• Tiki Software Community Association Wiki CMS Groupware: through 14.1; through 12.4 LTS; through 9.10 LTS; through 6.14

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/tiki_calendar_exec.rb
• https://tiki.org/article414-Important-Security-Fix-for-all-versions-of-Tiki
• https://www.acunetix.com/vulnerabilities/web/tiki-wiki-cms-remote-code-execution-via-calendar-module/
• https://www.exploit-db.com/exploits/39965
• https://www.vulncheck.com/advisories/tiki-wiki-cms-authenticated-command-injection-in-calendar-module

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