PageProps disclosure via cache-poisoning request race
Published May 14, 2025 · Updated May 15, 2025
Cache poisoning in Vercel Next.js before 14.2.24 or 15.0.0 through 15.1.5 allows remote attackers to expose pageProps data. A race between a ?__nextDataRequest=1 request and one bearing x-now-route-matches lets a non-cacheable data response retain cacheable headers. Exploitation requires the Pages Router, self-hosting behind a CDN that caches 200 responses without explicit cache-control, and precise timing; it exposes cached pageProps to later visitors without backend access or privilege escalation.
Summary
What happened
Cache poisoning in Vercel Next.js before 14.2.24 or 15.0.0 through 15.1.5 allows remote attackers to expose pageProps data. A race between a ?__nextDataRequest=1 request and one bearing x-now-route-matches lets a non-cacheable data response retain cacheable headers. Exploitation requires the Pages Router, self-hosting behind a CDN that caches 200 responses without explicit cache-control, and precise timing; it exposes cached pageProps to later visitors without backend access or privilege escalation.
The record
- CVE
- CVE-2025-32421
- Published
- May 14, 2025
- Updated
- May 15, 2025
- Vendor
- Vercel
- Product
- Next.js
- Classifications
- CWE-362, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 14, 2025CVE publishedPublication date reported by the CVE source.
- May 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 14.2.24
- Affected versionversion=>= 15.0.0, < 15.1.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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