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TI-2021-12771 Aliases CVE-2021-33254GHSA-65f4-q4wv-frpq

An issue was discovered in src/http/httpLib.c in EmbedThis Appweb Community Edition…

Priority LOW 36CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

An issue was discovered in src/http/httpLib.c in EmbedThis Appweb Community Edition 8.2.1, allows attackers to cause a denial of service via the stream paramter to the parseUri function.

Why it matters now

EPSS 0.01548 75th 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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:embedthis:appweb:8.2.1:*:*:*:community:*:*:*8.2.1VulnerableEmbedthis
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
  • cpe:2.3:a:embedthis:appweb:8.2.1:*:*:*:community:*:*:* Versions 8.2.1 Vulnerable ·Embedthis
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33254
  2. 2026-10-03 Alias added: GHSA-65f4-q4wv-frpq

References

Exploit 1

  • TI-2014-07893 Embedthis Appweb before 4.6.6 and 5.x before 5.2.1 allows remote attackers to cause a… CVSS 2.0MEDIUM 5.0
  • TI-2018-06289 The Embedthis HTTP library, and Appweb versions before 7.0.3, have a logic flaw related… CVSS 3.0HIGH 8.1
  • TI-2018-11058 An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. CVSS 3.1HIGH 7.5
  • TI-2018-11059 An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. CVSS 3.1HIGH 7.5
  • TI-2020-12362 Appweb before 7.2.2 and 8.x before 8.1.0, when built with CGI support, mishandles an HTTP… CVSS 3.1HIGH 7.5

Sources

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