CVE-2022-31138

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 3.1%, top 14% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

mailcow is a mailserver suite. Prior to mailcow-dockerized version 2022-06a, an extended privilege vulnerability can be exploited by manipulating the custom parameters regexmess, skipmess, regexflag, delete2foldersonly, delete2foldersbutnot, regextrans2, pipemess, or maxlinelengthcmd to execute arbitrary code. Users should update their mailcow instances with the update.sh script in the mailcow root directory to 2022-06a or newer to receive a patch for this issue. As a temporary workaround, the Syncjob ACL can be removed from all mailbox users, preventing changes to those settings.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
3%
EPSS %ILE
88%
KEV
Not listed

Published

July 11, 2022

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Aug 3, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available

CVE-2022-31138: IMAPSYNC (Syncjobs) Debug Extended Rights (hidden options) · Advisory · mailcow/mailcow-dockerized · GitHub

https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-vx9w-h33p-5vhc
github_release Patch Available

🌕🐄 Moone Update 2022 - The (now fully) Docker Compose v2 Update | Revision A

Patch available: mailcow/mailcow-dockerized 2022-06a

https://github.com/mailcow/mailcow-dockerized/releases/tag/2022-06a
github_commit Patch Available

commit d373164e13a1 (mailcow/mailcow-dockerized)

Patch available: mailcow/mailcow-dockerized 2024-08a (contains commit d373164e13a1)

https://github.com/mailcow/mailcow-dockerized/commit/d373164e13a14e058f82c9f1918a5612f375a9f9
generic🟡 PoC Available

GitHub - ly1g3/Mailcow-CVE-2022-31138: Mailcow CVE-2022-31138 RCE · GitHub

https://github.com/ly1g3/Mailcow-CVE-2022-31138

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 156 total refreshes for this CVE.

  1. 2026-09-07 15:58 UTCEPSS rescore
  2. 2026-09-06 13:45 UTCEPSS rescore
  3. 2026-09-05 15:25 UTCEPSS rescore
  4. 2026-09-05 09:44 UTCOSV refresh
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  21. 2026-08-18 19:41 UTCOSV refresh
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  24. 2026-08-16 14:53 UTCEPSS rescore
  25. 2026-08-16 02:11 UTCEPSS rescore
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  1. 2026-08-15 01:27 UTCEPSS rescore
  2. 2026-08-13 21:57 UTCEPSS rescore
  3. 2026-08-12 13:48 UTCEPSS rescore
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  5. 2026-08-09 13:44 UTCEPSS rescore
  6. 2026-08-08 16:34 UTCEPSS rescore
  7. 2026-08-07 16:24 UTCEPSS rescore
  8. 2026-08-06 13:44 UTCEPSS rescore
  9. 2026-08-05 19:15 UTCEPSS rescore
  10. 2026-08-04 15:07 UTCEPSS rescore
  11. 2026-08-04 10:35 UTCEPSS rescore
  12. 2026-08-03 15:57 UTCOSV refresh
  13. 2026-08-03 10:33 UTCEPSS rescore
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  18. 2026-07-28 15:33 UTCEPSS rescore
  19. 2026-07-26 14:52 UTCEPSS rescore
  20. 2026-07-25 14:15 UTCEPSS rescore
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  22. 2026-07-24 14:15 UTCEPSS rescore
  23. 2026-07-23 14:16 UTCEPSS rescore
  24. 2026-07-23 14:16 UTCEPSS rescore
  25. 2026-07-23 02:11 UTCEG score recompute
  26. 2026-07-22 22:58 UTCEG score recompute
  27. 2026-07-22 14:06 UTCEPSS rescore
  28. 2026-07-22 14:06 UTCEPSS rescore
  29. 2026-07-21 15:22 UTCEPSS rescore
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  31. 2026-07-20 17:05 UTCEPSS rescore
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  37. 2026-07-17 01:54 UTCOSV refresh
  38. 2026-07-16 17:00 UTCEPSS rescore
  39. 2026-07-15 16:56 UTCEPSS rescore
  40. 2026-07-15 16:56 UTCEPSS rescore
  41. 2026-07-15 01:58 UTCEPSS rescore
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  43. 2026-07-13 22:27 UTCEPSS rescore
  44. 2026-07-13 06:11 UTCEPSS rescore
  45. 2026-07-13 06:11 UTCEPSS rescore
  46. 2026-07-12 05:44 UTCEPSS rescore
  47. 2026-07-12 05:44 UTCEPSS rescore
  48. 2026-07-11 08:25 UTCEPSS rescore
  49. 2026-07-11 08:25 UTCEPSS rescore
  50. 2026-07-09 19:07 UTCEPSS rescore
  51. 2026-07-08 15:12 UTCEPSS rescore
  52. 2026-07-07 13:44 UTCEPSS rescore
  53. 2026-07-06 16:25 UTCEPSS rescore
  54. 2026-07-06 16:25 UTCEPSS rescore
  55. 2026-07-06 02:21 UTCEPSS rescore
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  57. 2026-07-05 02:28 UTCEPSS rescore
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  59. 2026-07-04 06:29 UTCEPSS rescore
  60. 2026-07-04 06:29 UTCEPSS rescore
  61. 2026-07-01 15:04 UTCEPSS rescore
  62. 2026-06-30 23:20 UTCEPSS rescore
  63. 2026-06-30 23:20 UTCEPSS rescore
  64. 2026-06-29 14:04 UTCEPSS rescore
  65. 2026-06-29 00:32 UTCOSV refresh
  66. 2026-06-28 14:06 UTCEPSS rescore
  67. 2026-06-28 04:54 UTCEPSS rescore
  68. 2026-06-27 03:07 UTCEPSS rescore
  69. 2026-06-25 13:48 UTCEPSS rescore
  70. 2026-06-25 13:48 UTCEPSS rescore
  71. 2026-06-24 14:03 UTCEPSS rescore
  72. 2026-06-24 14:03 UTCEPSS rescore
  73. 2026-06-23 21:31 UTCEPSS rescore
  74. 2026-06-23 21:31 UTCEPSS rescore
  75. 2026-06-22 14:24 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCly1g3/Mailcow-CVE-2022-31138
    First seen Jul 11, 2022

    Mailcow CVE-2022-31138

    Open source ↗

Frequently asked(5)

What is CVE-2022-31138?
CVE-2022-31138 is a high vulnerability published on July 11, 2022. mailcow is a mailserver suite. Prior to mailcow-dockerized version 2022-06a, an extended privilege vulnerability can be exploited by manipulating the custom parameters regexmess, skipmess, regexflag, delete2foldersonly, delete2foldersbutnot, regextrans2, pipemess, or maxlinelengthcmd to execute…
When was CVE-2022-31138 disclosed?
CVE-2022-31138 was first published in the National Vulnerability Database on July 11, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-31138 actively exploited?
CVE-2022-31138 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 12.3% of all scored CVEs.
What is the CVSS score of CVE-2022-31138?
CVE-2022-31138 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2022-31138?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-31138, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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