CVE-2015-9270: XSS exists in the the-holiday-calendar plugin before 1.11.3 for WordPress via the thc-month parameter.

Q: How do I fix CVE-2015-9270?

holiday calendar: upgrade to 1.11.3. Exact commands for each OS are on this page.

Q: Is CVE-2015-9270 being exploited?

CVE-2015-9270 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-9270 affect?

CVE-2015-9270 affects holiday calendar. Severity is medium (CVSS 6.1). XSS exists in the the-holiday-calendar plugin before 1.11.3 for WordPress via the thc-month parameter.

Q: How urgent is CVE-2015-9270?

Priority 37/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2015-9270 is a medium-severity flaw (CVSS 6.1) affecting holiday calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XSS exists in the the-holiday-calendar plugin before 1.11.3 for WordPress via the thc-month parameter.

Why this priority

No elevated risk signals yet

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	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-10-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: theholidaycalendar

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-10-01 23:29 UTCPublished CVE record published
2026-06-17 00:36 UTCUpdated Record last modified

theholidaycalendar holiday calendar UPGRADE

Affected: < 1.11.3

Fixed in: 1.11.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy holiday-calendar || rpm -q holiday-calendar || holiday-calendar --version

2. UPGRADE to 1.11.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade holiday-calendar

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade holiday-calendar

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2015-9270?

holiday calendar: upgrade to 1.11.3. Exact commands for each OS are on this page.

Is CVE-2015-9270 being exploited?

CVE-2015-9270 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-2015-9270 affect?

CVE-2015-9270 affects holiday calendar. Severity is medium (CVSS 6.1). XSS exists in the the-holiday-calendar plugin before 1.11.3 for WordPress via the thc-month parameter.

How urgent is CVE-2015-9270?

Priority 37/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

References

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