WordPress security changelog
CRITICAL CVE-2021-28121 Modified

Pc Robotstxt: A security weakness

Pc Robotstxt is affected by a security weakness. Exposure depends on how the affected operation is made reachable by the site. The resulting impact depends on how the affected component exposes the vulnerable operation.

CVE / CNA score 9.8 CVSS · cve@mitre.org
NVD score 9.8 CVSS 3.1 · nvd@nist.gov
Component
Pc Robotstxt
Plugin slug
pc-robotstxt
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Aug 12, 2021
Weakness
NVD-CWE-noinfo

This CVE was published Aug 12, 2021 and is one of 1 known issue for this plugin.

Update, patch or deactivate.

Update Pc Robotstxt 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.

Technical description

Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.

NVD vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary and upstream sources