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TI-2026-86427 Aliases CVE-2026-121796GHSA-r386-r8vg-hrxg

Stored XSS in Add From Server Lite WordPress plugin via SVG upload

Priority LOW 31CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
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 Add From Server Lite WordPress plugin before 6.0.0 does not restrict SVG uploads to users allowed to post unfiltered HTML. This is cross-site scripting (CWE-79), where input is not neutralized before web pages are generated. An authenticated user with the Author role or higher can upload an SVG file containing JavaScript that runs when other users view it, and a public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

The Add From Server Lite WordPress plugin before 6.0.0 does not restrict SVG uploads to users allowed to post unfiltered HTML, allowing users with the Author role and above to upload SVG files containing JavaScript and perform Stored XSS attacks.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00161 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Add From Server Lite (Unknown): 6.0.0

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
UnknownAdd From Server Litebefore 6.0.06.0.0Patch availableCNA
  • Add From Server Lite VendorUnknown Affected before 6.0.0 Fixed in 6.0.0 Patch available CNA

Remediation

Update Add From Server Lite to version 6.0.0, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

  • Fix · CNA Add From Server Lite (Unknown) Fixed in 6.0.0

Timeline

  1. 2026-11-07 Threatist record created from CVE-2026-121796
  2. 2026-11-07 Alias added: GHSA-r386-r8vg-hrxg
  3. 2026-11-07 CVSS score added · CISA ADP
  4. 2026-11-07 Weakness changed · CISA ADP
  5. 2026-11-07 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