CVE-2025-15099

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 7.3 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2025-12-26) is not newer than that change (2026-10-07), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2025-205425 (ENISA EUVD) · GHSA-2hg8-9339-xpwg (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan mitigationThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

A vulnerability was identified in simstudioai sim up to 0.5.27. This vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts of the component CRON Secret Handler. The manipulation of the argument INTERNAL_API_SECRET leads to improper authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The identifier of the patch is e359dc2946b12ed5e45a0ec9c95ecf91bd18502a. Applying a patch is the recommended action to fix this issue.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 26, 2025

Last Modified

October 7, 2026

Advisory Details (2)

Auto-updated Nov 8, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
GitHub pull request

fix(cron): reject CRON requests when CRON secret is not set

Fix merged in simstudioai/sim PR #2343 on 2025-12-13 — awaiting tagged release

https://github.com/simstudioai/sim/pull/2343
GitHub commit

commit e359dc2946b1 (simstudioai/sim)

Fix landed in simstudioai/sim commit e359dc2946b1 — awaiting tagged release

https://github.com/simstudioai/sim/commit/e359dc2946b12ed5e45a0ec9c95ecf91bd18502a

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 61× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 310 rows 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. None are among the latest 100 rows. The 210 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:49 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-11-13 10:19 UTCEchelonGraph re-scored
  3. 2026-11-13 10:19 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  4. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  5. 2026-11-12 11:17 UTCEchelonGraph re-scored
  6. 2026-11-12 11:17 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  7. 2026-11-11 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  8. 2026-11-11 12:27 UTCEchelonGraph re-scored
  9. 2026-11-11 12:27 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  10. 2026-11-10 16:39 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  11. 2026-11-10 13:36 UTCEchelonGraph re-scored
  12. 2026-11-10 13:36 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  13. 2026-11-09 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  14. 2026-11-09 14:42 UTCEchelonGraph re-scored
  15. 2026-11-09 14:42 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  16. 2026-11-08 16:36 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  17. 2026-11-08 15:52 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  18. 2026-11-07 17:02 UTCEchelonGraph re-scored
  19. 2026-11-07 17:02 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  20. 2026-11-07 16:36 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  21. 2026-11-06 18:12 UTCEchelonGraph re-scored
  22. 2026-11-06 18:12 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  23. 2026-11-06 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  24. 2026-11-05 19:22 UTCEchelonGraph re-scored
  25. 2026-11-05 19:22 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
Show 75 more
  1. 2026-11-05 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-11-05 08:55 UTCOSV refresh
  3. 2026-11-04 20:32 UTCEchelonGraph re-scored
  4. 2026-11-04 20:32 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  5. 2026-11-04 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-11-03 21:41 UTCEchelonGraph re-scored
  7. 2026-11-03 21:41 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  8. 2026-11-03 16:44 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  9. 2026-11-02 22:51 UTCEchelonGraph re-scored
  10. 2026-11-02 22:51 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  11. 2026-11-02 16:42 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  12. 2026-11-02 00:01 UTCEchelonGraph re-scored
  13. 2026-11-02 00:00 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub severity MODERATE · GitHub CVSS 7.3
  14. 2026-11-01 01:10 UTCEchelonGraph re-scored
  15. 2026-11-01 01:10 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  16. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  17. 2026-10-31 02:16 UTCEchelonGraph re-scored
  18. 2026-10-31 02:16 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  19. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  20. 2026-10-30 03:26 UTCEchelonGraph re-scored
  21. 2026-10-30 03:26 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  22. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  23. 2026-10-29 04:36 UTCEchelonGraph re-scored
  24. 2026-10-29 04:36 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  25. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  26. 2026-10-28 05:36 UTCEchelonGraph re-scored
  27. 2026-10-28 05:36 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  28. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  29. 2026-10-27 06:46 UTCEchelonGraph re-scored
  30. 2026-10-27 06:46 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  31. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  32. 2026-10-26 04:28 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  33. 2026-10-25 16:45 UTCEchelonGraph re-scored
  34. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  35. 2026-10-25 05:36 UTCEchelonGraph re-scored
  36. 2026-10-25 05:35 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  37. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  38. 2026-10-24 06:45 UTCEchelonGraph re-scored
  39. 2026-10-24 06:45 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  40. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  41. 2026-10-23 07:55 UTCEchelonGraph re-scored
  42. 2026-10-23 07:54 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  43. 2026-10-22 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  44. 2026-10-22 09:04 UTCEchelonGraph re-scored
  45. 2026-10-22 09:04 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  46. 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  47. 2026-10-21 10:12 UTCEchelonGraph re-scored
  48. 2026-10-21 10:12 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  49. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  50. 2026-10-20 11:21 UTCEchelonGraph re-scored
  51. 2026-10-20 11:21 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  52. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  53. 2026-10-19 12:29 UTCEchelonGraph re-scored
  54. 2026-10-19 12:29 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  55. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  56. 2026-10-18 10:47 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  57. 2026-10-18 05:48 UTCEchelonGraph re-scored
  58. 2026-10-17 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  59. 2026-10-17 07:13 UTCEchelonGraph re-scored
  60. 2026-10-17 07:12 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  61. 2026-10-16 16:37 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  62. 2026-10-16 08:21 UTCEchelonGraph re-scored
  63. 2026-10-16 08:21 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  64. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  65. 2026-10-15 07:27 UTCEchelonGraph re-scored
  66. 2026-10-15 07:26 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  67. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  68. 2026-10-14 03:23 UTCEchelonGraph re-scored
  69. 2026-10-14 03:23 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  70. 2026-10-13 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  71. 2026-10-12 23:23 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  72. 2026-10-12 17:22 UTCEchelonGraph re-scored
  73. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  74. 2026-10-12 12:13 UTCGHSA enrichmentGHSA-2hg8-9339-xpwg · GitHub CVSS 7.3
  75. 2026-10-11 20:53 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2025-15099?
CVE-2025-15099 is a critical-severity vulnerability; its CVE record was published on December 26, 2025. A vulnerability was identified in simstudioai sim up to 0.5.27. This vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts of the component CRON Secret Handler. The manipulation of the argument INTERNAL_API_SECRET leads to improper authentication. It is possible to initiate…
When was the CVE record for CVE-2025-15099 published?
The CVE record for CVE-2025-15099 was published on December 26, 2025. 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 October 7, 2026; the record at its source may have been updated since.
Is CVE-2025-15099 actively exploited?
CVE-2025-15099 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-15099?
CVE-2025-15099 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-15099?
An upstream fix for CVE-2025-15099 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix.

Dependency Blast Radius

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