CVE-2026-54694

CRITICALPre-NVD 9.69.6
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-75116 (ENISA EUVD)Source: ENISA EUVD

9.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 0.5%CVSS: 9.6Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

SkillTree is a micro-learning gamification platform. Prior to version 4.4.2, two independent code flaws combine into a single exploitable attack chain, with three distinct exploitation paths of escalating impact. StringHighlighter.js builds an HTML string by interpolating raw value substrings directly into a template literal with no HTML entity encoding. HighlightedValue.vue renders that string — and all unfiltered plain values — via Vue's v-html directive, which sets innerHTML. Separately, the account registration endpoint accepts firstName, lastName, and nickname fields and stores them without any HTML sanitization. An attacker self-registers with firstName = "" (28 characters — within the 30-character field limit) and visits any quiz. The next time an administrator opens the Quiz Runs page the payload executes in their browser. Three attack paths exist with escalating impact. The first is basic cross-site scripting. Any self-contained payload fitting the 30-character limit (e.g. `, which is 28 chars) fires automatically when the admin navigates to the runs page through normal use. Arbitrary code execution in the admin's browser is confirmed with zero extra steps. The second is remote script loading via import(). Using the split-field technique (lastName = ""), the attacker loads a full JavaScript file from their server. The file has no size limit and can perform any admin action — delete all projects, create backdoor accounts, dump user data, install a keylogger. No phishing required. The only constraint is that the URL must fit in 11 characters (//nsas.cc/p). The third is full cross-site request forgery token theft. Using eval(name), the attacker pre-sets window.name to a data-theft payload by sending the admin one redirect link first. The session cookie is HttpOnly and cannot be read via document.cookie`; however, the XSRF token is readable and the attacker leverages same-origin execution to call admin APIs from inside the victim's browser, relaying the responses to an external server. No admin interaction beyond routine use is required. Version 4.4.2 contains a patch.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 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.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
40th
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 (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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, Track* at medium and Attend at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Oct 7, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

Stored XSS in NationalSecurityAgency/skills-service via User Registration Enabling Admin Account Takeover · Advisory · NationalSecurityAgency/skills-service · GitHub

https://github.com/NationalSecurityAgency/skills-service/security/advisories/GHSA-hqfg-c8wf-w2g8

Weakness Classification(5)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 64× 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 100 of 111 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. None are among the latest 100 rows. The 11 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 01:15 UTCEG score recompute
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-11-01 03:21 UTCEG score recompute
  4. 2026-10-31 05:28 UTCEG score recompute
  5. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  11. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  18. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  20. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  22. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  24. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  1. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-20 05:28 UTCEG score recompute
  3. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-10-19 06:54 UTCEG score recompute
  5. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  7. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  9. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  11. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  13. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-14 01:57 UTCEG score recompute
  15. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  17. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-10-12 15:56 UTCEG score recompute
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  22. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-11 11:52 UTCEG score recompute
  24. 2026-10-10 20:12 UTCEG score recompute
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-10-09 23:55 UTCEG score recompute
  27. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  28. 2026-10-08 23:57 UTCEG score recompute
  29. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  30. 2026-10-07 23:50 UTCEG score recompute
  31. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
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  33. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  34. 2026-10-05 20:24 UTCEG score recompute
  35. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  36. 2026-10-04 23:24 UTCEG score recompute
  37. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  38. 2026-10-03 19:09 UTCEG score recompute
  39. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  40. 2026-10-02 21:20 UTCEG score recompute
  41. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  42. 2026-10-01 21:20 UTCEG score recompute
  43. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  44. 2026-09-30 18:21 UTCEG score recompute
  45. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
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  47. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  48. 2026-09-28 22:32 UTCEG score recompute
  49. 2026-09-28 18:43 UTCEG score recompute
  50. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-09-27 14:43 UTCEG score recompute
  52. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  53. 2026-09-26 19:12 UTCEG score recompute
  54. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  55. 2026-09-26 01:28 UTCEG score recompute
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  57. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  58. 2026-09-23 19:36 UTCEG score recompute
  59. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  60. 2026-09-22 16:07 UTCEG score recompute
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  74. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  75. 2026-09-13 17:16 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-54694?
CVE-2026-54694 is a critical-severity vulnerability; its CVE record was published on September 9, 2026. SkillTree is a micro-learning gamification platform. Prior to version 4.4.2, two independent code flaws combine into a single exploitable attack chain, with three distinct exploitation paths of escalating impact. StringHighlighter.js builds an HTML string by interpolating raw value substrings…
When was the CVE record for CVE-2026-54694 published?
The CVE record for CVE-2026-54694 was published on September 9, 2026. 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 September 10, 2026; the record at its source may have been updated since.
Is CVE-2026-54694 actively exploited?
CVE-2026-54694 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54694?
CVE-2026-54694 has a CVSS base score of 9.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54694?
The CVE record for CVE-2026-54694 names the fix: "Version 4.4.2 contains a patch."

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