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CVE-2026-2021— Slideshow Gallery LITE <= 1.8.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'alwaysauto' Shortcode Attribute

Quick assessment

Affected
contrid Slideshow Gallery LITE
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tribulant Slideshow Gallery LITE是Tribulant公司的一个图片幻灯片展示插件。 Tribulant Slideshow Gallery LITE 1.8.5及之前版本存在跨站脚本漏洞，该漏洞源于通过'alwaysauto'短代码属性的输入清理和输出转义不足，可能导致经过身份验证的攻击者（具有贡献者级别及以上权限）注入任意Web脚本，当用户访问注入页面时执行。

CVSS 6.4 · Medium EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
contrid Slideshow Gallery LITE ≤ 1.8.5 affected
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I. Basic Information for CVE-2026-2021

Vulnerability Information
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Vulnerability Title
Slideshow Gallery LITE <= 1.8.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'alwaysauto' Shortcode Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'alwaysauto' shortcode attribute in all versions up to, and including, 1.8.5. This is due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Tribulant Slideshow Gallery LITE 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tribulant Slideshow Gallery LITE是Tribulant公司的一个图片幻灯片展示插件。 Tribulant Slideshow Gallery LITE 1.8.5及之前版本存在跨站脚本漏洞，该漏洞源于通过'alwaysauto'短代码属性的输入清理和输出转义不足，可能导致经过身份验证的攻击者（具有贡献者级别及以上权限）注入任意Web脚本，当用户访问注入页面时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
contrid Slideshow Gallery LITE 0 ~ 1.8.5 -

II. Public POCs for CVE-2026-2021

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III. Intelligence Information for CVE-2026-2021

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Patches & Fixes for CVE-2026-2021 (1)

Vendor Pages for CVE-2026-2021 (1)

Other References for CVE-2026-2021 (1)

IV. Related Vulnerabilities

Same product: Slideshow Gallery LITE
Same vendor: contrid
Same weakness: CWE-79

V. Comments for CVE-2026-2021

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