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CVE-2023-42793

In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 99.99%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 12 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Cyfirma
Press · 03 Apr 2024, 07:00 · Vulnerability Analysis and Exploitation : Understanding CVE-2024-27198 in JetBrains TeamCity - Cyfirma
ReversingLabs
Press · 21 Dec 2023, 08:00 · The JetBrains TeamCity software supply chain attack: Lessons learned - ReversingLabs
Help Net Security
Press · 14 Dec 2023, 08:00 · Russian hackers target unpatched JetBrains TeamCity servers - Help Net Security
The Record from Recorded Future News
Press · 13 Dec 2023, 08:00 · Russian foreign intelligence service spotted exploiting JetBrains vulnerability - The Record from Recorded Future News
BleepingComputer
Press · 13 Dec 2023, 08:00 · CISA: Russian hackers target TeamCity servers since September - BleepingComputer
See all 12 source documents
TechTarget
Press · 19 Oct 2023, 07:00 · North Korean hackers exploit critical TeamCity vulnerability - TechTarget
Microsoft
Press · 18 Oct 2023, 07:00 · Multiple North Korean threat actors exploiting the TeamCity CVE-2023-42793 vulnerability - Microsoft
CCB Belgium
Press · 03 Oct 2023, 07:00 · Warning: Authentication bypass leading to RCE on JetBrains TeamCity server currently exploited, Patch Immediately! - CCB Belgium
Rapid7
Press · 29 Sep 2023, 07:00 · Metasploit Weekly Wrap-Up: Sep. 29, 2023 - Rapid7
SOC Prime
Press · 29 Sep 2023, 07:00 · CVE-2023-42793 Detection: An Authentication Bypass Vulnerability Leading to RCE on JetBrains TeamCity Server - SOC Prime
Help Net Security
Press · 26 Sep 2023, 07:00 · Critical JetBrains TeamCity vulnerability could be exploited to launch supply chain attacks (CVE-2023-42793) - Help Net Security
Security Affairs
Press · 25 Sep 2023, 07:00 · Alert! Patch your TeamCity instance to avoid server hack - Security Affairs

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 9.0 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

6

Public exploit entries / repo candidates

See 6 repos with metrics
RepositoryStarsForksLanguageUpdated
H454NSec/CVE-2023-427934510Python22 May 2024, 16:07
B4l3rI0n/CVE-2023-42793113Python24 Apr 2024, 23:10
Zenmovie/CVE-2023-4279393Shell11 Oct 2023, 11:40
hotplugin0x01/CVE-2023-4279320Python06 May 2024, 10:15
burakacar6/CVE-2023-42793-TeamCity-Unauthenticated-RCE00Python05 Sep 2026, 06:29
johnossawy/CVE-2023-42793_POC00Python08 Jan 2024, 18:21
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 100.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:58.231410+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
19 Sep 2023, 16:57
First press mention
25 Sep 2023, 07:00
Added to the CISA KEV catalog
04 Oct 2023, 00:00
Latest press mention
03 Apr 2024, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
6 repositories