CVE-2018-8911 — Cross-site scripting (XSS) vulnerability in Attachment Preview in Synology Note Station before 2.5.1-0844 allows remote authenticated users to inject arbitrary web script or HTML via malicious attachments

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MEDIUM

Cross-site scripting (XSS) vulnerability in Attachment Preview in Synology Note Station before 2.5.1-0844 allows remote authenticated users to inject arbitrary web script or HTML via malicious attachments

Published May 9, 2018

6.5

MEDIUM

CVSS 3.0

EPSS 1.03%

Description

Cross-site scripting (XSS) vulnerability in Attachment Preview in Synology Note Station before 2.5.1-0844 allows remote authenticated users to inject arbitrary web script or HTML via malicious attachments.

Affected products

Vendor Synology Product Note Station Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <2.5.1-0844

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Synology

Note Station

n/a

Version	Status	Constraints
unspecified	affected	<2.5.1-0844

Remediation

No remediation recorded yet.

Metrics

1.03% 0.01029

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01029

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (9 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.03% (0.01029)	62.36th	v5 (v2026.06.15)
Sep 20, 2026	1.03% (0.01029)	62.16th	v5 (v2026.06.15)
Jul 20, 2024	0.05% (0.00054)	22.10th	v3 (v2023.03.01)
Jul 10, 2024	0.05% (0.00054)	21.95th	v3 (v2023.03.01)
Mar 7, 2023	0.05% (0.00054)	19.91th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)
Feb 3, 2022	0.56% (0.00556)	13.12th	v5 (v2026.06.15)
Apr 14, 2021	0.56% (0.00556)	0.00th	v1