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TI-2026-79564 Aliases CVE-2026-109936GHSA-7hjg-79p8-hrjm

Stored cross-site scripting in Otter Blocks WordPress plugin

Priority LOW 35CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

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

Summary

The Otter Blocks WordPress plugin from 0 before 3.2.8 is affected. Its pattern for rewriting dynamic-content tokens is not bounded, so it can consume the quote that closes an HTML attribute and pull adjacent unescaped data into the markup as new attributes (CWE-79). An unauthenticated attacker can plant stored cross-site scripting that runs in the browser of any visitor to an affected page, including a logged-in administrator. An exploit link is listed in the references.

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

Description from the CNA

The Otter Blocks WordPress plugin before 3.2.8 does not correctly bound a pattern it uses to rewrite its dynamic-content tokens while rendering blocks, so the pattern can consume the quote that closes an HTML attribute and pull adjacent unescaped data into the markup as new attributes. This allows unauthenticated users to achieve stored Cross-Site Scripting that executes in the browser of any visitor who views an affected page, including a logged-in administrator.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00282 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Otter Blocks (Unknown): 3.2.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownOtter Blocksbefore 3.2.83.2.8Patch availableCNA
  • Otter Blocks VendorUnknown Affected before 3.2.8 Fixed in 3.2.8 Patch available CNA

Remediation

Update Otter Blocks to version 3.2.8, which fixes the flaw.

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

  • Fix · CNA Otter Blocks (Unknown) Fixed in 3.2.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Otter Blocks 3.2.8

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-79563 Access control bypass in Otter Blocks exposes restricted block contentPriority LOW 30
    • TI-2026-79561 Stored cross-site scripting in Otter Blocks plugin via block stylesPriority LOW 30
    • TI-2026-79562 Otter Blocks exposes non-public content through REST APIPriority LOW 24
    Show all 4 records →

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-109936
  2. 2026-10-23 Alias added: GHSA-7hjg-79p8-hrjm
  3. 2026-10-23 CVSS score added · CISA ADP
  4. 2026-10-23 Weakness changed · CISA ADP
  5. 2026-10-23 CISA SSVC decision points changed

References

Exploit 1

Sources

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