wp-admin/upgrade.php in WordPress, probably 2.6.x,: An open redirect

wp-admin/upgrade.php in WordPress, probably 2.6.x, is affected by an open redirect. Exposure depends on how the affected operation is made reachable by the site. A crafted link can redirect visitors from the trusted site to an attacker-controlled destination.

CVE / CNA score 4.3 CVSS · cve@mitre.org

NVD score 4.3 CVSS 2.0 · nvd@nist.gov

Component: wp-admin/upgrade.php in WordPress, probably 2.6.x,
Plugin slug: Not applicable
Affected: See vendor advisory
Safe version: See mitigation notes
Published: Apr 28, 2009
Weakness: CWE-59 — Improper Link Resolution Before File Access ('Link Following')

What to do

Update, patch or deactivate.

Update wp-admin/upgrade.php in WordPress, probably 2.6.x, 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

Open redirect vulnerability in wp-admin/upgrade.php in WordPress, probably 2.6.x, allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the backto parameter.

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

References

Update, patch or deactivate.

Technical description

Primary and upstream sources