Security readout for executives and security teams
Plain-English summary
This CVE describes a cross-site scripting issue in the Pixiv Custom WordPress theme before version 2.1.6. A remote attacker could inject script or HTML through the s parameter. Business urgency depends on whether the old theme is still used on public WordPress sites.
Executive priority
Treat this as an inventory-driven cleanup item unless the affected theme is internet-facing and still active. Prioritize public WordPress sites first, especially where administrator sessions or customer-facing pages may be exposed.
Technical view
CVE-2011-3858 is an XSS vulnerability affecting the Pixiv Custom theme for WordPress before 2.1.6. The reported injection point is the s parameter. The source bundle does not provide CVSS, CWE mapping, detailed exploit conditions, authentication requirements, or confirmed impact beyond web script or HTML injection.
Likely exposure
Exposure is likely limited to WordPress installations running Pixiv Custom theme versions older than 2.1.6. The supplied affected-product metadata is incomplete, so confirm through site inventory, theme directories, and WordPress administration records.
Exploitation context
The CVE states remote attackers can inject arbitrary web script or HTML. The bundle does not cite active exploitation, public weaponization, or CISA KEV listing, so active exploitation should not be assumed.
Researcher notes
Evidence is sparse. The CVE record identifies the component, vulnerable version range, and parameter, but lacks CVSS, CWE, authentication context, exploit maturity, and detailed advisory content in the supplied bundle. Avoid assuming broader WordPress or plugin exposure.
Mitigation direction
- Upgrade Pixiv Custom theme to version 2.1.6 or later if deployed.
- Remove the theme if it is unused or unsupported.
- Check vendor or archived advisory guidance for any additional remediation details.
- Review WordPress hardening and plugin/theme lifecycle controls.
Validation and detection
- Inventory WordPress sites for the Pixiv Custom theme.
- Confirm installed theme version is older than 2.1.6.
- Review web logs for suspicious requests involving the s parameter.
- Verify remediation by confirming the deployed theme version after updates.
Public sources used
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2011-3858 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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://sitewat.ch/en/Advisories/16CVE 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.