What’s Vulnerable › Vulnerabilities

CVE-2021-42078

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-08 · updated 2026-06-17
• Weakness: CWE-79

Description

PHP Event Calendar through 2021-11-04 allows persistent cross-site scripting (XSS), as demonstrated by the /server/ajax/events_manager.php title parameter. This can be exploited by an adversary in multiple ways, e.g., to perform actions on the page in the context of other users, or to deface the site.

Affected products

• Php Event Calendar Project Php Event Calendar: 2021-11-04

References

• http://seclists.org/fulldisclosure/2021/Nov/24
• https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-049.txt
• http://seclists.org/fulldisclosure/2021/Nov/24
• https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-049.txt

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