Label Studio is an open source data labeling tool. Prior to version 1.16.0, Label Studio's /projects/upload-example endpoint allows injection of arbitrary HTML through a GET request with an appropriately crafted label_config query parameter. By crafting a specially formatted XML label config with inline task data containing malicious HTML/JavaScript, an attacker can achieve Cross-Site Scripting (XSS). While the application has a Content Security Policy (CSP), it is only set in report-only mode, making it ineffective at preventing script execution. The vulnerability exists because the upload-example endpoint renders user-provided HTML content without proper sanitization on a GET request. This allows attackers to inject and execute arbitrary JavaScript in victims' browsers by getting them to visit a maliciously crafted URL. This is considered vulnerable because it enables attackers to execute JavaScript in victims' contexts, potentially allowing theft of sensitive data, session hijacking, or other malicious actions. Version 1.16.0 contains a patch for the issue.
CVE-2025-25296
This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 1.8%, top 23% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EG Risk
- 43(Track)EG Risk 43/100SSVC: 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 computedSeverity61% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 76.9%
- KEV
- Not listed
Published
February 14, 2025
Last Modified
August 25, 2025
References (2)
- security-advisories@githubhttps://github.com/HumanSignal/label-studio/commit/8cf6958e1e27ef6a03ed287e674470975d340885
- security-advisories@githubhttps://github.com/HumanSignal/label-studio/security/advisories/GHSA-wpq5-3366-mqw4
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| label-studio | 0.4.1 ... 1.9.2.post0 (88 versions) | 1.16.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 47× 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.
- 2026-07-23 02:51 UTCEG score recompute
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Publicly available exploits
(2 references)Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCmath-x-io/CVE-2025-25296-POCFirst seen Mar 1, 2025
Proof of Concept (POC) for the CVE-2025-25296 vulnerability affecting Label Studio versions prior to 1.16.0
Open source ↗ - Nucleihttp/cves/2025/CVE-2025-25296.yamlFirst seen Jan 1, 2025
Label Studio < 1.16.0 - Cross-Site Scripting
Open source ↗
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2025-25296?
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Dependency Blast Radius
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