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TI-2021-06803 Aliases CVE-2021-24516GHSA-p4vw-x9cg-642w

PlanSo Forms <= 2.6.3 - Authenticated Stored Cross-Site Scripting

Priority LOW 23CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
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 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

The PlanSo Forms WordPress plugin through 2.6.3 does not escape the title of its Form before outputting it in attributes, allowing high privilege users such as admin to set XSS payload in it, even when the unfiltered_html is disallowed, leading to an Authenticated Stored Cross-Site Scripting issue.

Why it matters now

EPSS 0.00638 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownPlanSo Forms2.6.3 – 2.6.3—No fix listedCNA
  • PlanSo Forms VendorUnknown Affected 2.6.3 – 2.6.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:planso:planso_forms:*:*:*:*:*:wordpress:*:*up to 2.6.3VulnerablePlanso
  • cpe:2.3:a:planso:planso_forms:*:*:*:*:*:wordpress:*:* Versions up to 2.6.3 Vulnerable ·Planso

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-24516
  2. 2026-10-03 Alias added: GHSA-p4vw-x9cg-642w
  3. 2026-10-24 EPSS moved to the 50th–90th percentile

References

Exploit 1

Sources

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