CVE-2024-3899Public exploitNetwork attack vector

Stored XSS via unsanitized image titles

Published Sep 11, 2024 · Updated Sep 11, 2024

Stored XSS in Envira Gallery before 1.8.15 allows remote authenticated users with Author access to execute scripts via image titles. The image settings workflow stores the Title field without sanitizing it and renders that value without escaping on embedded gallery pages. Author-level post-writing access is required, and the script executes in the browser of a user who views or edits the poisoned gallery.

CVSS severity4.8
Medium
EPSS probability0.35%
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 Envira Gallery before 1.8.15 allows remote authenticated users with Author access to execute scripts via image titles. The image settings workflow stores the Title field without sanitizing it and renders that value without escaping on embedded gallery pages. Author-level post-writing access is required, and the script executes in the browser of a user who views or edits the poisoned gallery.

The record

CVE
CVE-2024-3899
Published
Sep 11, 2024
Updated
Sep 11, 2024
Vendor
Envira Gallery LLC
Product
Envira Gallery
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=0 <1.8.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Envira Gallery LLC · Envira Galleryversion=0 <1.8.15
Envira Gallery · Envira Galleryversion=0 <1.8.15

Published CVSS scores

4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

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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