CVE-2026-8900Disclosure

LOWCVSS 6.4 · MEDIUM

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

The Simple SEO Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.2.8 due to insufficient input sanitization and output escaping. 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. WordPress KSES does not strip malicious shortcode attribute values on post save, allowing contributor-level users to persist payloads that execute for any visitor, including administrators reviewing the post.

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1.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-79

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Threat summary

Public PoC is present in monitored signal
3 mentions across 2 observed days
Momentum state: stable

What's happening

PoC mentioned or linked in 1 signal
Technical details provided in 3 signals
Disclosure: 2 classified signals
Peaked 1d ago at 2 mentions (2026-06-07); latest day: 1
3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

PoC

133.3%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-06-07	2	Disclosure2
2026-06-13	1	PoC1

Full discourse3 posts

Atomic Edge@atomicedgeWAF130d
PoC
https://atomicedge.io/cve-proof/cve-2026-8900-simple-seo-slideshow-version-1-2-8-medium-vulnerability-proof-of-concept CVE-2026-8900 simple-seo-slideshow (CVSS Score 6.4) #WordPress plugin #vulnerability #cybersecurity #wordpressfirewall #wordpresssecurity #hacking #wpsecurity…
Post summary
A Proof of Concept for CVE-2026-8900, a medium‑severity vulnerability affecting the WordPress Simple SEO Slideshow plugin, has been published; no active exploitation or patch details are mentioned.
0000036
9 followersView on X
Infoflowcloud@infoflowcloud136d
Disclosure
🚨*CVE* CVE-2026-8900 The Simple SEO Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.2.8 due to i… https://www.cve.org/CVERecord?id=CVE-2026-8900 ----- Traducción: CVE-2026-8900 El … http://infoflow.cloud`
Post summary
CVE‑2026‑8900 is a stored‑XSS vulnerability in the Simple SEO Slideshow WordPress plugin up to version 1.2.8; the post lists the flaw but offers no exploitation or patch information.
0000019
79 followersView on X
CVE@CVEnew136d
Disclosure
CVE-2026-8900 The Simple SEO Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.2.8 due to i… https://www.cve.org/CVERecord?id=CVE-2026-8900
Post summary
CVE-2026-8900 identifies a stored cross‑site scripting flaw in the Simple SEO Slideshow WordPress plugin caused by vulnerable shortcode attributes, affecting all versions up to 1.2.8. No exploit, patch, or active exploitation information is provided.
00000225
57.6K followersView on X

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