CVE-2026-121862

HIGH
MEDIUM Priority: 0.04 BB Relevance: 68/100
Published: 2026-11-11 Modified: 2026-11-11 First seen: 2026-11-11 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: High
A: High

Description

The Knowledge Building WordPress plugin before 0.7.3 does not sanitise and escape comments submitted through its reply feature, and publishes them without moderation, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against any visitor of the affected posts, including administrators.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
Unknown Knowledge Building 0 < 0.7.3
Unknown Knowledge Building 0 < 0.7.3

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.41%
Raw Score 0.004090
Percentile 35.7%
Date 2026-11-12

Intelligence Sources

mitre ref →
nvd ref →