VulnSocial

CVE-2026-3554Disclosure

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 Sherk Custom Post Type Displays plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' shortcode attribute in all versions up to, and including, 1.2.1. This is due to insufficient input sanitization and output escaping on the 'title' attribute of the 'sherkcptdisplays' shortcode. Specifically, in the sherkcptdisplays_func() function in includes/SherkCPTDisplaysShortcode.php, the 'title' attribute value is extracted from shortcode_atts() on line 19 and directly concatenated into an HTML <h2> tag on line 31 without any 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.

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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 (2026-03-21); latest day: 1
  • 3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-03-21: 2Mentions · 2026-03-31: 1PoC Mentioned / Linked · 2026-03-31: 1Technical Details · 2026-03-21: 2Technical Details · 2026-03-31: 103-2103-31
Signal classification2 categories
Disclosure
266.7%
PoC
133.3%
Referenced assets4 URLs
Classification over time
DateTotalLabels
2026-03-212
Disclosure2
2026-03-311
PoC1
Full discourse3 posts
  • Atomic Edge@atomicedgeWAF
    PoC

    https://atomicedge.io/cve-proof/cve-2026-3554-sherk-custom-post-type-displays-version-1-2-1-medium-vulnerability-proof-of-concept CVE-2026-3554 #WordPress plugin #vulnerability sherk-custom-post-type-displays https://atomicedge.io/?p=6566 #cybersecurity #wordpressfirewall #wor…

    Post summary

    This post links to a proof‑of‑concept for CVE‑2026‑3554 affecting the Sherk Custom Post Type Displays WordPress plugin (v1.2.1), providing technical details but no evidence of active exploitation or patch information.

    0000057
    5 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-3554 Stored XSS in WordPress Sherk Custom Post Type Displays Plugin via Shortcode https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-3554

    Post summary

    A stored XSS vulnerability (CVE‑2026‑3554) was found in the WordPress Sherk Custom Post Type Displays plugin, exploitable via a shortcode. No proof‑of‑concept, exploit code, patch, or evidence of active exploitation is provided.

    0000039
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-3554 The Sherk Custom Post Type Displays plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' shortcode attribute in all versions up to, and inc… https://www.cve.org/CVERecord?id=CVE-2026-3554

    Post summary

    The text announces a stored XSS vulnerability in the Sherk Custom Post Type Displays WordPress plugin, specifying the affected attribute but providing no exploitation details or mitigation steps.

    0000055
    56.8K followersView on X

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