Dashboard / CVE-2026-35569

CVE-2026-35569

HIGH
MEDIUM Priority: 0.03 BB Relevance: 57/100
Published: 2026-04-15 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

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

Description

ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a stored cross-site scripting vulnerability in SEO-related fields (SEO Title and Meta Description), where user-controlled input is rendered without proper output encoding into HTML contexts including <title> tags, <meta> attributes, and JSON-LD structured data. An attacker can inject a payload such as "></title><script>alert(1)</script> to break out of the intended HTML context and execute arbitrary JavaScript in the browser of any authenticated user who views the affected page. This can be leveraged to perform authenticated API requests, access sensitive data such as usernames, email addresses, and roles via internal APIs, and exfiltrate it to an attacker-controlled server. This issue has been fixed in version 4.29.0.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
apostrophecms apostrophecms < 4.29.0

References & Advisories (3)

Bug Bounty Relevance

57 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

8.7 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS — Exploitation Probability

0.30%
Raw Score 0.002980
Percentile 22.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00298
2026-10-28
0.00298

Intelligence Sources

nvd ref →

External Links