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TI-2026-83503 Aliases CVE-2026-120019GHSA-59h3-w5qx-76fv

Stored cross-site scripting in W3 Total Cache WordPress plugin

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
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 W3 Total Cache plugin for WordPress is affected in all versions up to and including 2.10.7. Insufficient input sanitization and output escaping of the comment parameter lets scripts be stored (CWE-79). An unauthenticated remote attacker can inject scripts that run when a user opens an affected page, if HTML Minify is enabled with the default mfunc entry and the attacker predicts the placeholder from the server clock.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 2.10.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires HTML Minify to be enabled with the default 'mfunc' entry present in the ignored-comment stems list, and exploitation depends on the attacker predicting the md5(time()) placeholder namespace by reading the server clock via the HTTP Date response header within the applicable time window.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00221 12th 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

VendorProductAffected versionsFixed inStatusSource
BoldGridW3 Total Cacheup to 2.10.7—No fix listedCNA
  • W3 Total Cache VendorBoldGrid Affected up to 2.10.7 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
cpe:2.3:a:boldgrid:w3_total_cache:*:*:*:*:*:*:*:*——BoldGrid
  • cpe:2.3:a:boldgrid:w3_total_cache:*:*:*:*:*:*:*:* Versions — — ·BoldGrid

Remediation

The sources list no fixed version for W3 Total Cache.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

  1. 2026-10-31 Threatist record created from CVE-2026-120019
  2. 2026-10-31 Alias added: GHSA-59h3-w5qx-76fv
  3. 2026-11-01 Priority changed: MEDIUM → LOW
  4. 2026-11-01 CISA SSVC decision points changed

References

Other 6

  • TI-2013-01782 WordPress W3 Total Cache Plugin 0.9.2.8 has a Remote PHP Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2019-04758 pub/sns.php in the W3 Total Cache plugin before 0.9.4 for WordPress allows remote… CVSS 3.1HIGH 7.5
  • TI-2025-39670 WordPress Client Invoicing by Sprout Invoices plugin <= 20.8.7 - PHP Object Injection vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2026-04390 W3 Total Cache <= 2.9.3 - Unauthenticated Security Token Exposure via User-Agent Header CVSS 3.1HIGH 7.5
  • TI-2026-08154 W3 Total Cache <= 2.9.4 - Unauthenticated Arbitrary File Read via 'f_array[]' Parameter CVSS 3.1HIGH 7.5
  • TI-2024-11141 W3 Total Cache <= 2.8.1 Information Exposure via Log Files CVSS 3.1HIGH 7.5
See all 67 →

Sources

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