CVE-2023-0764Public exploitNetwork attack vector

Stored XSS via unsanitized gallery image metadata

Published Apr 17, 2023 · Updated Feb 6, 2025

Stored XSS in BestWebSoft Gallery before 4.7.0 allows remote authenticated users to execute script via crafted gallery image data. The plugin saves gllr_image_text and gllr_image_alt_tag POST values without proper sanitization, then renders them in gallery image attributes. An Author account can store the payload, but execution requires a visitor to load the affected gallery, exposing that visitor's browser session to attacker-controlled script.

CVSS severity5.4
Medium
EPSS probability0.44%
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 BestWebSoft Gallery before 4.7.0 allows remote authenticated users to execute script via crafted gallery image data. The plugin saves gllr_image_text and gllr_image_alt_tag POST values without proper sanitization, then renders them in gallery image attributes. An Author account can store the payload, but execution requires a visitor to load the affected gallery, exposing that visitor's browser session to attacker-controlled script.

The record

CVE
CVE-2023-0764
Published
Apr 17, 2023
Updated
Feb 6, 2025
Vendor
BestWebSoft
Product
Gallery by BestWebSoft
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record 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 <4.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BestWebSoft · Gallery by BestWebSoftversion=0 <4.7.0

Published CVSS scores

5.4CISA-ADPCVSS: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 exploitPublished

Weakness, pattern, technique

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