PatchTheCVECVE-2021-27330: Triconsole Datepicker Calendar <3.77 is affected by cross-site scripting (XSS) in calendar_form.php
CVE-2021-27330 is a medium-severity flaw (CVSS 6.1) affecting datepicker calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Triconsole Datepicker Calendar <3.77 is affected by cross-site scripting (XSS) in calendar_form.php. Attackers can read authentication cookies that are still active, which can be used to perform further attacks such as reading browser history, directory listings, and file contents.
Why this priority
- EPSS top 6%: very likely to be exploited
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 6.2% (top 6%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2021-02-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Nuclei scan template: Triconsole Datepicker Calendar <3.77 - Cross-Site Scripting
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-27330?
datepicker calendar: upgrade to 3.77. Exact commands for each OS are on this page.
Is CVE-2021-27330 being exploited?
CVE-2021-27330 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-27330 affect?
CVE-2021-27330 affects datepicker calendar. Severity is medium (CVSS 6.1). Triconsole Datepicker Calendar <3.77 is affected by cross-site scripting (XSS) in calendar_form.php. Attackers can read authentication cookies that are still active, which can be used to perform further attacks such as reading browser histo
How urgent is CVE-2021-27330?
Priority 50/100. EPSS top 6%: very likely to be exploited; Public exploit reference