CSS Injection Vulnerability in Spectra Legacy Plugin for WordPress
CVE-2026-10827

3.5LOW

Key Information:

Vendor

WordPress
Status
Spectra Legacy
Vendor
CVE Published:
1 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10827?

The Spectra Legacy WordPress plugin, prior to version 2.20.0, lacks proper validation and escaping for specific block style attributes, enabling users with a Contributor role or higher to insert arbitrary CSS. This vulnerable behavior allows these users to affect the styling of pages viewed by anonymous visitors, potentially leading to forced loading of external resources, visual alterations of the page, or even data exfiltration through CSS attribute selectors. While JavaScript execution is constrained by KSES, the ability to manipulate CSS poses significant risks for web integrity and user trust.

Affected Version(s)

Spectra Legacy 0 < 2.20.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-10827 - Proof of Concept

References

https://wpscan.com/vulnerability/068ac525-423b-42f8-9ef4-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
3.5
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muni Nitish Kumar Yaddala
WPScan
.