WordPress security changelog
MEDIUM CVE-2015-5734 Modified

the legacy theme preview implementation in wp-includes/theme.php in WordPress before 4.2.4: Cross-site scripting

the legacy theme preview implementation in wp-includes/theme.php in WordPress before 4.2.4 is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.

CVE / CNA score 4.3 CVSS · cve@mitre.org
NVD score 4.3 CVSS 2.0 · nvd@nist.gov
Component
the legacy theme preview implementation in wp-includes/theme.php in WordPress before 4.2.4
Plugin slug
Not applicable
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Nov 09, 2015
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
What to do

Update, patch or deactivate.

Update the legacy theme preview implementation in wp-includes/theme.php in WordPress before 4.2.4 to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

Cross-site scripting (XSS) vulnerability in the legacy theme preview implementation in wp-includes/theme.php in WordPress before 4.2.4 allows remote attackers to inject arbitrary web script or HTML via a crafted string.

NVD vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

References

Primary and upstream sources