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Vulnerability record · CVE-2025-59837 · published 28 October 2025

CVE-2025-59837: Astro cross-site scripting vulnerability

Astro · Astro

Astro is a web framework that includes an image proxy. In versions 5.13.4 and later before 5.13.10, the image proxy domain validation can be bypassed by using backslashes in the href parameter, allowing server-side requests to arbitrary URLs. This can lead to server-side request forgery (SSRF) and potentially cross-site scripting (XSS). This vulnerability exists due to an incomplete fix for CVE-2025-58179. Fixed in 5.13.10.

7.2 CVSS 3.1 High EPSS 0.33% · top 76.7% CWE-79 · Cross-site scriptingCWE-918 · Server-side request forgery (SSRF)
7.2CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

Astro is a web framework that includes an image proxy. In versions 5.13.4 and later before 5.13.10, the image proxy domain validation can be bypassed by using backslashes in the href parameter, allowing server-side requests to arbitrary URLs. This can lead to server-side request forgery (SSRF) and potentially cross-site scripting (XSS). This vulnerability exists due to an incomplete fix for CVE-2025-58179. Fixed in 5.13.10.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/withastro/astro/commit/1e2499e8ea83ebfa233a18a7499e1ccf169e56f4 Patch
https://github.com/withastro/astro/commit/9ecf3598e2b29dd74614328fde3047ea90e67252 Patch
https://github.com/withastro/astro/security/advisories/GHSA-qcpr-679q-rhm2 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-59837), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.