CVE-2025-54528VulnerabilityPublished 28 Jul 2025

CVE-2025-54528: JetBrains TeamCity · Cross-Site Request Forgery

Affects JetBrains TeamCitySource CVE Database V5

Not known to be exploited · CVSS 5.4 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.4Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
JetBrains TeamCity	Affected =0	Fixed in–

AI-suggested

To mitigate CVE-2025-54528, European organizations should take the following specific actions: 1) Immediately upgrade TeamCity to version 2025.07 or later once the patch is officially released by JetBrains to ensure the CSRF vulnerability is remediated. 2) Until a patch is available, implement strict network segmentation and access controls to limit exposure of the TeamCity server, especially restricting access to trusted IP ranges and enforcing strong authentication mechanisms. 3) Educate users and developers about the risk of phishing and social engineering attacks that could trigger CSRF exploits, emphasizing caution when interacting with unexpected links or prompts related to GitHub integrations. 4) Review and audit existing GitHub App connections within TeamCity for any unauthorized changes or suspicious activity, and consider temporarily disabling GitHub App integrations if feasible. 5) Employ Web Application Firewalls (WAFs) with CSRF protection rules to detect and block suspicious requests targeting the TeamCity GitHub App connection endpoints. 6) Monitor logs and alerts for unusual activity related to build configurations or repository access changes to enable rapid incident response. These targeted measures go beyond generic advice by focusing on the specific integration flow and operational context of TeamCity in European environments.

Description

In JetBrains TeamCity before 2025.07 a CSRF was possible in GitHub App connection flow

Impact

For European organizations, the impact of CVE-2025-54528 could be significant, especially for those heavily reliant on automated build and deployment pipelines using JetBrains TeamCity integrated with GitHub repositories. Unauthorized manipulation of the GitHub App connection flow could allow attackers to alter repository access or build configurations, potentially injecting malicious code or disrupting continuous integration processes. This could lead to compromised software integrity, delayed development cycles, and increased risk of supply chain attacks. Organizations in sectors with high regulatory requirements, such as finance, healthcare, and critical infrastructure, may face compliance issues if unauthorized changes go undetected. Additionally, the medium severity and requirement for user interaction mean that phishing or social engineering campaigns could be used to exploit this vulnerability, increasing the risk profile. Although no active exploits are known, the widespread use of TeamCity in European software development environments makes this a relevant threat that should be addressed promptly to maintain secure development operations.

CWE-352Cross-Site Request Forgery (CSRF) (opens in a new tab)
Compound weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #3OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation
Ensure that the application is free of cross-site scripting issues (CWE-79), because most CSRF defenses can be bypassed using attacker-controlled script.
Architecture and Design
Generate a unique nonce for each form, place the nonce into the form, and verify the nonce upon receipt of the form. Be sure that the nonce is not predictable (CWE-330).
OWASP Cheat Sheets
REST Assessment (opens in a new tab)
REST Security (opens in a new tab)
Cross-Site Request Forgery Prevention (opens in a new tab)
Authorization Testing Automation (opens in a new tab)
Insecure Direct Object Reference Prevention (opens in a new tab)
OWASP ASVS 4.0.3
V13.2.3 (opens in a new tab)
V4.2.2 (opens in a new tab)
V13.3.2 (opens in a new tab)
Attack patterns
JSON Hijacking (aka JavaScript Hijacking) (opens in a new tab)
Cross-Domain Search Timing (opens in a new tab)
Cross Site Identification (opens in a new tab)
Cross Site Request Forgery (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

jetbrains.com/privacy-security/issues-fixed/ (opens in a new tab)

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Jul 2025, 16:49 UTC

WeaknessesCWE-352

Technical details

References

Community reviews

Related threats