CVE-2025-27157

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 74% 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

Mastodon is a self-hosted, federated microblogging platform. Starting in version 4.2.0 and prior to versions 4.2.16 and 4.3.4, the rate limits are missing on /auth/setup. Without those rate limits, an attacker can craft requests that will send an email to an arbitrary addresses. Versions 4.2.16 and 4.3.4 fix the issue.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

February 27, 2025

Last Modified

June 24, 2025

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 28× 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 147 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-16 14:07 UTCEPSS rescore
  4. 2026-09-16 05:13 UTCEPSS rescore
  5. 2026-09-13 18:54 UTCOSV refresh
  6. 2026-09-13 16:46 UTCEPSS rescore
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  24. 2026-08-25 20:10 UTCOSV refresh
  25. 2026-08-25 13:48 UTCEPSS rescore
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  1. 2026-08-24 14:16 UTCEPSS rescore
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  3. 2026-08-21 23:48 UTCEPSS rescore
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 13:47 UTCEPSS rescore
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  11. 2026-08-12 13:50 UTCEPSS rescore
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  14. 2026-08-09 12:27 UTCOSV refresh
  15. 2026-08-07 16:26 UTCEPSS rescore
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  23. 2026-07-30 16:27 UTCEPSS rescore
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  25. 2026-07-28 15:35 UTCEPSS rescore
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  27. 2026-07-26 14:53 UTCEPSS rescore
  28. 2026-07-25 14:17 UTCEPSS rescore
  29. 2026-07-24 14:17 UTCEPSS rescore
  30. 2026-07-24 13:11 UTCOSV refresh
  31. 2026-07-23 02:52 UTCEG score recompute
  32. 2026-07-22 14:07 UTCEPSS rescore
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  44. 2026-07-15 16:57 UTCEPSS rescore
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  46. 2026-07-15 01:59 UTCEPSS rescore
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  48. 2026-07-13 22:29 UTCEPSS rescore
  49. 2026-07-13 06:12 UTCEPSS rescore
  50. 2026-07-13 06:12 UTCEPSS rescore
  51. 2026-07-12 05:46 UTCEPSS rescore
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  53. 2026-07-11 08:27 UTCEPSS rescore
  54. 2026-07-11 08:27 UTCEPSS rescore
  55. 2026-07-09 19:09 UTCEPSS rescore
  56. 2026-07-08 15:14 UTCEPSS rescore
  57. 2026-07-07 13:45 UTCEPSS rescore
  58. 2026-07-07 08:51 UTCOSV refresh
  59. 2026-07-06 16:27 UTCEPSS rescore
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  61. 2026-07-06 02:22 UTCEPSS rescore
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  66. 2026-06-30 23:22 UTCEPSS rescore
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  68. 2026-06-28 14:07 UTCEPSS rescore
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  70. 2026-06-28 04:55 UTCEPSS rescore
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  72. 2026-06-27 03:08 UTCEPSS rescore
  73. 2026-06-25 13:49 UTCEPSS rescore
  74. 2026-06-25 13:49 UTCEPSS rescore
  75. 2026-06-24 14:04 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-27157?
CVE-2025-27157 is a medium vulnerability published on February 27, 2025. Mastodon is a self-hosted, federated microblogging platform. Starting in version 4.2.0 and prior to versions 4.2.16 and 4.3.4, the rate limits are missing on /auth/setup. Without those rate limits, an attacker can craft requests that will send an email to an arbitrary addresses. Versions 4.2.16 and…
When was CVE-2025-27157 disclosed?
CVE-2025-27157 was first published in the National Vulnerability Database on February 27, 2025, with the most recent update on June 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-27157 actively exploited?
CVE-2025-27157 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.4% of all scored CVEs.
What is the CVSS score of CVE-2025-27157?
CVE-2025-27157 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2025-27157?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-27157, 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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