CVE-2019-15614Network attack vector

Script execution via unsanitized HTML file rendering

Published Feb 4, 2020 · Updated Aug 5, 2024

Cross-site scripting in Nextcloud GmbH Nextcloud iOS Client before 2.25.0 allows remote authenticated users to run script via malicious HTML. The in-app HTML viewer renders an opened file without sanitizing attacker-controlled markup, allowing active content to execute. Exploitation requires an authenticated attacker to place the file and a user to open it, exposing data and actions available to the embedded view.

CVSS severity3.5
Low
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Nextcloud GmbH Nextcloud iOS Client before 2.25.0 allows remote authenticated users to run script via malicious HTML. The in-app HTML viewer renders an opened file without sanitizing attacker-controlled markup, allowing active content to execute. Exploitation requires an authenticated attacker to place the file and a user to open it, exposing data and actions available to the embedded view.

The record

CVE
CVE-2019-15614
Published
Feb 4, 2020
Updated
Aug 5, 2024
Vendor
Nextcloud GmbH
Product
Nextcloud iOS Client
Classifications
CWE-79, CWE-116, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.25.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Nextcloud iOS Clientversion=2.25.0

Published CVSS scores

3.5Nextcloud GmbHCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116Improper Encoding or Escaping of Output
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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