XSS in Offshorewebmaster Availability Calendar
CVE-2021-24604
The Availability Calendar WordPress plugin before 1.2.2 does not sanitise or escape its Category Names before outputting them in page/post where the associated shortcode is embed, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.006 (46.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Offshorewebmaster Availability_calendar
- Unknown Availability Calendar — versions 1.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-24604?
- CVE-2021-24604 is a medium-severity vulnerability in Offshorewebmaster Availability Calendar, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-09-20.
- How severe is CVE-2021-24604?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2021-24604 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.