TI-2026-74615 Aliases CVE-2026-78087 GHSA-5vv9-v5h9-cghv

Stored cross-site scripting in VK Blocks via Group block linkToPost

LOW 28CWE-79Published 2026-10-15 · Updated 2026-10-15

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The VK Blocks plugin for WordPress is affected in all versions through 1.126.1. Insufficient input sanitization and output escaping in the Group block's linkToPost feature enable stored cross-site scripting (CWE-79). An authenticated attacker with contributor-level access or above can inject arbitrary web scripts into pages that execute whenever a user accesses the injected page.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The VK Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Group Block 'linkToPost' Feature in all versions up to, and including, 1.126.1 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00184 8th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Vektor,Inc.	VK Blocks	up to 1.126.1	—	No fix listed	CNA

VK Blocks VendorVektor,Inc. Affected up to 1.126.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:vektor-inc:vk_blocks::::::::	—	—	Vektor,Inc.

cpe:2.3:a:vektor-inc:vk_blocks:*:*:*:*:*:*:*:* Versions — — ·Vektor,Inc.

Remediation

The sources list no fixed version for VK Blocks.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-15 Threatist record created from CVE-2026-78087
2026-10-16 Alias added: GHSA-5vv9-v5h9-cghv
2026-10-16 CISA SSVC decision points changed
2026-10-16 Priority changed: MEDIUM → LOW

References

Other 2

TI-2023-00888 VK All in One Expansion Unit < 9.87.1.0 - Reflected XSS CVSS 3.1MEDIUM 6.1
TI-2023-00220 VK All in One Expansion Unit < 9.86.0.0 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
TI-2026-67879 PHP object injection in WordPress VK Google Job Posting Manager CVSS 3.1HIGH 8.8
TI-2024-01949 VK All in One Expansion Unit <= 9.95.0.1 - Information Exposure CVSS 3.1MEDIUM 6.5
TI-2025-23273 WordPress VK Filter Search plugin <= 2.20.2 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
TI-2024-25262 WordPress VK All in One Expansion Unit plugin <= 9.99.1.0 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences