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Vulnerability details: VCID-xbf5-y4wx-7ue1
Vulnerability ID VCID-xbf5-y4wx-7ue1
Aliases CVE-2025-64764
GHSA-wrwg-2hg8-v723
Summary Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feature is used in the targeted application, regardless of what was intended by the component template(s). This issue has been patched in version 5.15.8.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00243 https://api.first.org/data/v1/epss?cve=CVE-2025-64764
epss 0.00243 https://api.first.org/data/v1/epss?cve=CVE-2025-64764
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-wrwg-2hg8-v723
cvssv3.1 7.1 https://github.com/withastro/astro
generic_textual HIGH https://github.com/withastro/astro
cvssv3.1 7.1 https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
generic_textual HIGH https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
ssvc Track https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
cvssv3.1 7.1 https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
cvssv3.1_qr HIGH https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
generic_textual HIGH https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
ssvc Track https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
cvssv3.1 7.1 https://nvd.nist.gov/vuln/detail/CVE-2025-64764
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2025-64764
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-64764
https://github.com/withastro/astro
790d9425f39bbbb462f1c27615781cd965009f91 https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
CVE-2025-64764 https://nvd.nist.gov/vuln/detail/CVE-2025-64764
GHSA-wrwg-2hg8-v723 https://github.com/advisories/GHSA-wrwg-2hg8-v723
GHSA-wrwg-2hg8-v723 https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://github.com/withastro/astro
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-11-19T21:06:04Z/ Found at https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-11-19T21:06:04Z/ Found at https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2025-64764
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.47841
EPSS Score 0.00243
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:57:19.746625+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2025/64xxx/CVE-2025-64764.json 38.6.0