CVE-2021-34667

MediumCVSS 6.1/10Last modified Jun 17, 2026

Description

The Calendar_plugin WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of `$_SERVER['PHP_SELF']` in the ~/calendar.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
Calendar_plugin	Calendar_plugin	>= 1.0, <= 1.0

References

https://plugins.trac.wordpress.org/browser/calendar-plugin/trunk/calendar.php#L86Exploit, Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34667Exploit, Third Party Advisory
https://plugins.trac.wordpress.org/browser/calendar-plugin/trunk/calendar.php#L86Exploit, Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34667Exploit, Third Party Advisory

Timeline

Published: Aug 16, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-346685.4The WordPress Real Media Library WordPress plugin is vulnerable to Stored Cross-Site Scripting via the name parameter in the ~/inc/overrides CVE-2021-34675.5A NULL pointer dereference flaw was found in the way Jasper versions before 2.0.26 handled component references in CDEF box in the JP2 image CVE-2021-346757.5Basix NEX-Forms through 7.8.7 allows authentication bypass for stored PDF reports.CVE-2021-346767.5Basix NEX-Forms through 7.8.7 allows authentication bypass for Excel report generation.CVE-2021-346797.5Thycotic Password Reset Server before 5.3.0 allows credential disclosure.CVE-2021-34685.5A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix soc CVE-2021-346823.7Receita Federal IRPF 2021 1.7 allows a man-in-the-middle attack against the update feature.CVE-2021-346835.3An issue was discovered in EXCELLENT INFOTEK CORPORATION (EIC) E-document System 3.0. A remote attacker can use kw/auth/bbs/asp/get_user_ema CVE-2021-346849.8Hitachi Vantara Pentaho Business Analytics through 9.1 allows an unauthenticated user to execute arbitrary SQL queries on any Pentaho data s CVE-2021-346857.2UploadService in Hitachi Vantara Pentaho Business Analytics through 9.1 does not properly verify uploaded user files, which allows an authen CVE-2021-346875.3iDrive RemotePC before 7.6.48 on Windows allows information disclosure. A man in the middle can recover a system's Personal Key when a clien CVE-2021-346883.3iDrive RemotePC before 7.6.48 on Windows allows information disclosure. A locally authenticated attacker can read an encrypted version of th