Dashboard / CVE-2026-77871

CVE-2026-77871

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 63/100
Published: 2026-10-28 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Changed
C: Low
I: Low
A: None

Description

The Post Snippets – Custom WordPress Code Snippets Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 4.2.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Entity-encoded payloads such as <script>...</script> survive WordPress's wp_kses_post on-save sanitization because kses does not decode HTML entities, and are only converted back into executable HTML tags at render time by the plugin's own shortcode filter. This requires snippet shortcodes to be enabled.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
saadiqbal Post Snippets – Custom WordPress Code Snippets Customizer 0

References & Advisories (10)

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

6.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

0.24%
Raw Score 0.002410
Percentile 15.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00241
2026-10-28
0.00241

Intelligence Sources

mitre ref →
nvd ref →

External Links