CVE-2026-125880— Stored XSS via MMS3 patch metadata (admin context)

Quick assessment

Affected

N-able N-central

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

N-able N-central 存在 HTTP 头未正确中和脚本语法的问题，可导致跨站脚本（XSS）漏洞。此问题影响 N-central 26.4.1 之前的所有版本。

CVSS 8.3 · High Updated Nov 11, 2026

Possible ATT&CK Techniques 2 AI

T1566 · Phishing T1190 · Exploit Public-Facing Application

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

Stored XSS via MMS3 patch metadata (admin context)

Source: CVE Program / CVE List V5

Vulnerability Description

Improper neutralization of HTTP headers for scripting syntax vulnerability in N-able N-central allows Cross-Site Scripting (XSS). This issue affects N-central: before 26.4.1.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

对HTTP头部进行脚本语法转义处理不恰当

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
N-able	N-central	0 ~ 26.4.1	-

II. Public POCs for CVE-2026-125880

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-125880

请登录查看更多情报信息。

Other References for CVE-2026-125880 (1)

https://me.n-able.com/s/security-advisory/aArVy0000002imXKAQ/cve202612588-stored-xss-via-mms3-patch-metadata-admin-context vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-125880

Same Patch Batch · N-able · 2026-11-10 · 8 CVEs total

CVE-2026-125883	9.3 CRITICAL	Multiple XXE Vulnerabilities
CVE-2026-125881	9.3 CRITICAL	Schema-hint SSRF via service import schema validation
CVE-2026-125878	8.7 HIGH	Multiple OGNL Injection vulnerabilities
CVE-2026-125879	8.6 HIGH	Local privilege escalation to root via nable-writable syslog-ng config
CVE-2026-125882	8.6 HIGH	RCE via file repository upload path traversal
CVE-2026-91000	8.4 HIGH	Insecure IPC Channels lead to local privilege escalation
CVE-2026-125958	7.5 HIGH	Root RCE via unsigned NSP upgrade package upload

IV. Related Vulnerabilities

Same product: N-central

Same vendor: N-able

Same weakness: CWE-644