In JetBrains TeamCity before 2025.11 stored XSS was possible via session attribute
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Dec 11, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.5% · 40th percentile
- CWE
- CWE-79
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Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 21 / 40 · 5.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 5.4
- CNA · JetBrains
- 4.8
- 0.6 point gap
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| jetbrains | teamcity | cpe:2.3:a:jetbrains:teamcity |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- jetbrains teamcitybefore 2025.11
Versions reported by the vendor
Affected version ranges reported by the assigning authority (JetBrains). Independent of NVD's CPE analysis and usually ahead of it.
JetBrains TeamCity
- before 2025.11affected · semver
Same product
jetbrains: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-27198In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possibleKEV99Now
- CVE-2023-42793In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possibleKEV99Now
- CVE-2026-63077In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocolKEV96Now
- CVE-2024-27199In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possibleKEV89Now
- CVE-2024-23917In JetBrains TeamCity before 2023.11.3 authentication bypass leading to RCE was possible55Plan
- CVE-2025-46618In JetBrains TeamCity before 2025.03.1 stored XSS was possible on Data Directory tab43Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| JetBrains TeamCity | 2025.11 | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-46618230 days apartIn JetBrains TeamCity before 2025.03.1 stored XSS was possible on Data Directory tab43Plan
- CVE-2026-49371169 days apartIn JetBrains TeamCity before 2026.1.1 reflected XSS in the keyword filter was possible32Monitor
- CVE-2025-52876171 days apartIn JetBrains TeamCity before 2025.03.3 reflected XSS on the favoriteIcon page was possible32Monitor
- CVE-2025-31140259 days apartIn JetBrains TeamCity before 2025.03 stored XSS was possible on Cloud Profiles page32Monitor
- CVE-2025-52877171 days apartIn JetBrains TeamCity before 2025.03.3 reflected XSS on diskUsageBuildsStats page was possible30Monitor
- CVE-2025-681655 days apartIn JetBrains TeamCity before 2025.11 reflected XSS was possible on VCS Root setup25Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
nvd-primary
Root cause
User content is inserted into the page as HTML. The browser interprets the content as code rather than data.
The bug in code
The whole CWE-79 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
commentEl.innerHTML = comment.body;Fixed
commentEl.textContent = comment.body;Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
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References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.