CVE-2021-42078

Public Exploit

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.30%
Third-Party Advisory seclists.org Third-Party Advisory syss.de
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-049.txt third party advisory exploit
http://seclists.org/fulldisclosure/2021/Nov/24 mailing list exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-42078?
CVE-2021-42078 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42078?
To fix CVE-2021-42078, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42078 being actively exploited in the wild?
It is possible that CVE-2021-42078 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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