changedetection.io is a free open source web page change detection tool. A Stored Cross Site Scripting is present in changedetection.io Watch update API in versions prior to 0.50.34 due to insufficient security checks. Two scenarios are possible. In the first, an attacker can insert a new watch with an arbitrary URL which really points to a web page. Once the HTML content is retrieved, the attacker updates the URL with a JavaScript payload. In the second, an attacker substitutes the URL in an existing watch with a new URL that is in reality a JavaScript payload. When the user clicks on *Preview* and then on the malicious link, the JavaScript malicious code is executed. Version 0.50.34 fixes the issue.
CVE-2025-62780
This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 64% 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
- 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 computedSeverity54% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 36.0%
- KEV
- Not listed
Published
November 10, 2025
Last Modified
June 17, 2026
References (2)
- security-advisories@githubhttps://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-4c3j-3h7v-22q9
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-4c3j-3h7v-22q9
Vendor Advisories for CVE-2025-62780(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| changedetection-io | 0.38.2 ... 0.50.9 (156 versions) | 0.50.34 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 46× 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 03:00 UTCEG score recompute▲ 1.90
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- 2026-06-24 09:57 UTCNVD updateCVSS v3 → 5.4 · severity → MEDIUM
- 2026-06-23 21:32 UTCEPSS rescore
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- 2026-05-29 19:32 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
Publicly available exploits
(1 reference)Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Nucleihttp/cves/2025/CVE-2025-62780.yamlFirst seen Jan 1, 2025
ChangeDetection.io <= v0.50.33 - Stored XSS via Watch API
Open source ↗
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2025-62780?
When was CVE-2025-62780 disclosed?
Is CVE-2025-62780 actively exploited?
What is the CVSS score of CVE-2025-62780?
How do I remediate CVE-2025-62780?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-62780
Is Your Infrastructure Affected by CVE-2025-62780?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.