CVE-2025-64745Public exploit

Reflected XSS via unescaped corrected pathname

Published Nov 13, 2025 · Updated Nov 13, 2025

Reflected XSS in Astro 5.2.0 through 5.15.5 allows remote attackers to execute JavaScript in a developer's browser via crafted URLs. The trailingSlashMismatchTemplate derives corrected from the user-controlled pathname and inserts it unescaped into an href attribute and link text. Exploitation requires trailingSlash always or never, a running development server, and a developer opening the crafted link; production builds are unaffected.

CVSS severity2.7
Low
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Astro 5.2.0 through 5.15.5 allows remote attackers to execute JavaScript in a developer's browser via crafted URLs. The trailingSlashMismatchTemplate derives corrected from the user-controlled pathname and inserts it unescaped into an href attribute and link text. Exploitation requires trailingSlash always or never, a running development server, and a developer opening the crafted link; production builds are unaffected.

The record

CVE
CVE-2025-64745
Published
Nov 13, 2025
Updated
Nov 13, 2025
Vendor
Astro Technology Company
Product
Astro
Classifications
CWE-79, T1204.001, T1566.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 5.2.0, < 5.15.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Astro Technology Company · Astroversion=>= 5.2.0, < 5.15.6

Published CVSS scores

6.1National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.7GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link
T1566.002Spearphishing Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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