CVE-2023-27294

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2023-02-28. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

Improper neutralization of input during web page generation allows an authenticated attacker with access to a restricted account to submit malicious Javascript as the description for a calendar event, which would then be executed in other users' browsers if they browse to that event. This could result in stealing session tokens from users with higher permission levels or forcing users to make actions without their knowledge.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
40(Track*)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

February 28, 2023

Last Modified

March 21, 2025

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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 161 total refreshes for this CVE.

  1. 2026-09-08 21:57 UTCEPSS rescore
  2. 2026-09-07 15:59 UTCEPSS rescore
  3. 2026-09-06 13:45 UTCEPSS rescore
  4. 2026-09-05 15:25 UTCEPSS rescore
  5. 2026-09-04 14:29 UTCOSV refresh
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  22. 2026-08-18 01:45 UTCOSV refresh
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  24. 2026-08-16 14:53 UTCEPSS rescore
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  1. 2026-08-15 01:28 UTCEPSS rescore
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  25. 2026-07-27 14:10 UTCEPSS rescore
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  32. 2026-07-23 02:20 UTCEG score recompute
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  44. 2026-07-16 17:01 UTCEPSS rescore
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  46. 2026-07-16 04:53 UTCOSV refresh
  47. 2026-07-15 16:56 UTCEPSS rescore
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  49. 2026-07-15 01:58 UTCEPSS rescore
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  51. 2026-07-13 22:28 UTCEPSS rescore
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  58. 2026-07-09 19:08 UTCEPSS rescore
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  65. 2026-07-02 16:59 UTCEPSS rescore
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  67. 2026-06-30 23:21 UTCEPSS rescore
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  72. 2026-06-28 04:54 UTCEPSS rescore
  73. 2026-06-28 04:34 UTCOSV refresh
  74. 2026-06-27 03:07 UTCEPSS rescore
  75. 2026-06-25 13:48 UTCEPSS rescore

Frequently asked(5)

What is CVE-2023-27294?
CVE-2023-27294 is a medium vulnerability published on February 28, 2023. Improper neutralization of input during web page generation allows an authenticated attacker with access to a restricted account to submit malicious Javascript as the description for a calendar event, which would then be executed in other users' browsers if they browse to that event. This could…
When was CVE-2023-27294 disclosed?
CVE-2023-27294 was first published in the National Vulnerability Database on February 28, 2023, with the most recent update on March 21, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-27294 actively exploited?
CVE-2023-27294 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.1% of all scored CVEs.
What is the CVSS score of CVE-2023-27294?
CVE-2023-27294 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2023-27294?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-27294, 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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