Security readout for executives and security teams
Plain-English summary
CVE-2015-9270 is a cross-site scripting issue in an older WordPress calendar plugin. If a site still runs The Holiday Calendar before 1.11.3, attacker-controlled script could potentially run in a visitor or administrator browser. The source bundle does not provide severity scoring or confirmed exploitation.
Executive priority
Treat as a targeted cleanup item for legacy WordPress estates. Prioritize quickly if the plugin is internet-facing or used on administrator-accessed pages, but current evidence does not support emergency active-exploitation handling.
Technical view
The issue is XSS in the thc-month parameter of the-holiday-calendar WordPress plugin before 1.11.3. Available sources do not specify authentication requirements, whether the XSS is reflected or stored, CVSS metrics, or privilege impact.
Likely exposure
Exposure appears limited to WordPress sites running The Holiday Calendar plugin before 1.11.3. The bundle does not identify broader affected products, CPEs, hosting conditions, or deployment prerequisites.
Exploitation context
The CVE is not marked KEV, and the provided sources do not state active exploitation. A Full Disclosure reference exists from 2015, so public technical discussion existed, but exploit maturity is not established here.
Researcher notes
Source detail is thin: no CVSS, CWE, CPE, authentication context, or patch notes are included beyond the before-1.11.3 version boundary and thc-month parameter. Avoid assuming exploitability beyond XSS without reviewing the linked disclosures.
Mitigation direction
- Inventory WordPress sites for The Holiday Calendar plugin usage.
- Upgrade The Holiday Calendar to version 1.11.3 or later if available.
- If upgrade is not possible, disable or remove the plugin.
- Check current vendor guidance before applying compensating controls.
Validation and detection
- Confirm plugin name and version on each WordPress installation.
- Review web access logs for suspicious requests involving thc-month.
- Verify the plugin is updated, disabled, or removed after remediation.
- Check whether security monitoring flags script injection attempts against affected pages.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2015-9270 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://wordpress.org/plugins/the-holiday-calendar/#developersCVE reference · x_refsource_MISC
- https://seclists.org/fulldisclosure/2015/Jul/125CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.