CVE-2023-28370

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 1.1% (65th percentile of EPSS-scored CVEs). 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Open redirect vulnerability in Tornado versions 6.3.1 and earlier allows a remote unauthenticated attacker to redirect a user to an arbitrary web site and conduct a phishing attack by having user access a specially crafted URL.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100CISA SSVC

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
Severity61% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.1%
EPSS %ILE
65th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

May 25, 2023

Last Modified

November 3, 2025

References (3)

Vendor Advisories for CVE-2023-28370(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-tornado (4.2.1-1ubuntu3.1+esm1) @ xenial2026-05-25ubuntu
ubuntupython3-tornado (6.4.1-2ubuntu0.1) @ oracular2026-05-25ubuntu
redhatpython-tornado-0:6.1.0-9.el92023-11-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
python-tornado6.1.0-1
  • every version up to 6.1.0-1+deb11u1: fixed in 6.1.0-1+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-tornado6.2.0-3
  • every version up to 6.2.0-3+deb12u1: fixed in 6.2.0-3+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-tornado—
  • every version up to 6.3.2-1: fixed in 6.3.2-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-tornado—
  • every version up to 6.3.2-1: fixed in 6.3.2-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
tornado0.2 ... 6.3b1 (68 versions)
  • every version up to 6.3.2: fixed in 6.3.2
—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 25× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 86 of 171 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 14 repeat rows among the latest 100 are merged into the row they repeat. The 85 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 19:57 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  2. 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  3. 2026-10-08 17:06 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  4. 2026-10-07 23:45 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  5. 2026-10-06 15:15 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  6. 2026-10-05 17:41 UTCEPSS rescoreEPSS 1.1% · 65th percentile
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  10. 2026-10-01 19:47 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  11. 2026-09-30 16:20 UTCEG score recompute
  12. 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  13. 2026-09-29 15:16 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  14. 2026-09-28 13:49 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  15. 2026-09-27 13:42 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  16. 2026-09-26 00:22 UTCEPSS rescoreEPSS 1.1% · 65th percentile
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  18. 2026-09-23 13:45 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  19. 2026-09-23 10:53 UTCOSV refresh
  20. 2026-09-22 14:45 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  21. 2026-09-20 20:14 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  22. 2026-09-16 14:05 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  23. 2026-09-13 16:44 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  24. 2026-09-12 14:58 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  25. 2026-09-11 14:50 UTCEPSS rescoreEPSS 1.1% · 64th percentile
Show 61 more
  1. 2026-09-11 09:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  2. 2026-09-08 21:57 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  3. 2026-09-07 15:59 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  4. 2026-09-06 13:45 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  5. 2026-09-05 15:25 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  6. 2026-09-04 13:58 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  7. 2026-09-04 05:46 UTCOSV refresh
  8. 2026-09-04 05:04 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  9. 2026-09-02 14:09 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  10. 2026-09-01 13:51 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  11. 2026-08-30 19:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  12. 2026-08-30 01:19 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  13. 2026-08-28 21:38 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  14. 2026-08-27 14:23 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  15. 2026-08-26 14:43 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  16. 2026-08-25 13:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  17. 2026-08-24 14:14 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  18. 2026-08-23 00:17 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  19. 2026-08-21 23:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  20. 2026-08-20 22:53 UTCEPSS rescoreEPSS 1.1% · 64th percentile
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  22. 2026-08-18 13:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  23. 2026-08-17 16:29 UTCOSV refresh
  24. 2026-08-17 13:44 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  25. 2026-08-16 14:53 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  26. 2026-08-16 02:12 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  27. 2026-08-15 01:28 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  28. 2026-08-13 21:58 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  29. 2026-08-12 13:48 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  30. 2026-08-11 13:39 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
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  37. 2026-08-04 10:35 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  38. 2026-08-03 10:34 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  39. 2026-08-02 11:57 UTCOSV refresh
  40. 2026-08-02 02:24 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  41. 2026-08-01 04:13 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  42. 2026-07-30 16:26 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  43. 2026-07-30 01:28 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  44. 2026-07-28 15:34 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  45. 2026-07-27 14:10 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  46. 2026-07-25 14:16 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
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  48. 2026-07-23 14:16 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  49. 2026-07-23 02:20 UTCEG score recompute
  50. 2026-07-22 23:08 UTCEG score recompute
  51. 2026-07-22 14:06 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  52. 2026-07-21 15:23 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
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  56. 2026-07-18 10:03 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
  57. 2026-07-16 17:01 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
  58. 2026-07-15 19:23 UTCOSV refresh
  59. 2026-07-15 16:56 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
  60. 2026-07-15 01:58 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
  61. 2026-07-13 22:28 UTCEPSS rescoreEPSS 1.1% · 62nd percentile

Related CVEs(same product + same vendor + same CWE)

Same vendor

1 shown

ubuntu:USN-7150-1

Frequently asked(5)

What is CVE-2023-28370?
CVE-2023-28370 is a medium vulnerability published on May 25, 2023. Open redirect vulnerability in Tornado versions 6.3.1 and earlier allows a remote unauthenticated attacker to redirect a user to an arbitrary web site and conduct a phishing attack by having user access a specially crafted URL.
When was the CVE record for CVE-2023-28370 published?
The CVE record for CVE-2023-28370 was published on May 25, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 3, 2025; the record at its source may have been updated since.
Is CVE-2023-28370 actively exploited?
CVE-2023-28370 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-28370?
CVE-2023-28370 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2023-28370?
A fix for CVE-2023-28370 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-28370 are linked in the Vendor Advisories panel on this page.

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