CVE-2025-1529Network attack vector

Author-level stored XSS via unsanitized Lottie uploads

Published May 1, 2025 · Updated Apr 8, 2026

Stored XSS in Aarstein Media AM LottiePlayer 3.5.3 and earlier allows remote authenticated users to inject scripts via Lottie uploads. The upload path stores insufficiently sanitized Lottie content, and page rendering outputs that content without adequate escaping. Author-level WordPress access is required; the stored script runs in each visitor's browser with the affected page's origin privileges.

CVSS severity6.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Aarstein Media AM LottiePlayer 3.5.3 and earlier allows remote authenticated users to inject scripts via Lottie uploads. The upload path stores insufficiently sanitized Lottie content, and page rendering outputs that content without adequate escaping. Author-level WordPress access is required; the stored script runs in each visitor's browser with the affected page's origin privileges.

The record

CVE
CVE-2025-1529
Published
May 1, 2025
Updated
Apr 8, 2026
Vendor
Aarstein Media
Product
AM LottiePlayer
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Aarstein Media · AM LottiePlayerversion=0 <=3.5.3

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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