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TI-2021-14543 Aliases CVE-2021-36093GHSA-p8h5-xqwr-ww86

DoS attack using PostMaster filters

Priority LOW 26CWE-185Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

It's possible to create an email which can be stuck while being processed by PostMaster filters, causing DoS. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.28 and prior versions; 8.0.x version 8.0.15 and prior versions.

Why it matters now

EPSS 0.01108 66th percentileScored 2026-11-07
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
OTRS AG((OTRS)) Community Edition6.0.1 and later—No fix listedCNA
OTRS AGOTRS7.0.x – 7.0.28; 8.0.x – 8.0.15—No fix listedCNA
  • ((OTRS)) Community Edition VendorOTRS AG Affected 6.0.1 and later Fixed in — No fix listed CNA
  • OTRS VendorOTRS AG Affected 7.0.x – 7.0.28; 8.0.x – 8.0.15 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:otrs:otrs:*:*:*:*:community:*:*:*6.0.1VulnerableOTRS AG
cpe:2.3:a:otrs:otrs:*:*:*:*:-:*:*:*7.0.0 to before 7.0.29; 8.0.0 to before 8.0.16VulnerableOTRS AG
  • cpe:2.3:a:otrs:otrs:*:*:*:*:community:*:*:* Versions 6.0.1 Vulnerable ·OTRS AG
  • cpe:2.3:a:otrs:otrs:*:*:*:*:-:*:*:* Versions 7.0.0 to before 7.0.29; 8.0.0 to before 8.0.16 Vulnerable ·OTRS AG

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

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

  • Release ·

    OTRS ((OTRS)) Community Edition 6.0.x*

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2021-14544 XSS attack in appointment edit popup screenPriority LOW 26
    • TI-2021-14546 Support Bundle includes S/Mime and PGP secret or PINPriority LOW 24
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-36093
  2. 2026-10-03 Alias added: GHSA-p8h5-xqwr-ww86

References

Advisory 1

  • TI-2017-12458 In OTRS 6.0.x up to and including 6.0.1, OTRS 5.0.x up to and including 5.0.24, and OTRS… CVSS 3.0HIGH 8.8
  • TI-2026-35608 SQL Injection via MySQL Quote Method CVSS 3.1CRITICAL 9.1
  • TI-2023-04991 SSL Certificates are not checked for E-Mail Handling CVSS 3.1CRITICAL 9.1
  • TI-2022-04045 SQL Injection via OTRS Search API CVSS 3.1CRITICAL 9.8
  • TI-2017-12258 Code injection exists in Kernel/System/Spelling.pm in Open Ticket Request System (OTRS) 5… CVSS 3.0HIGH 8.8
  • TI-2017-06753 In Open Ticket Request System (OTRS) 3.3.x through 3.3.16, 4.x through 4.0.23, and 5.x… CVSS 3.0HIGH 8.8
See all 141 →

Sources

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