CVE-2023-25571

mediumpriority · track · 22EPSS 0.005 · 39 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.45% (39th) EPSS

CVSS 5.4 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-26

Backstage is an open platform for building developer portals. `@backstage/catalog-model` prior to version 1.2.0, `@backstage/core-components` prior to 0.12.4, and `@backstage/plugin-catalog-backend` prior to 1.7.2 are affected by a cross-site scripting vulnerability. This vulnerability allows a malicious actor with access to add or modify content in an instance of the Backstage software catalog to inject script URLs in the entities stored in the catalog. If users of the catalog then click on said URLs, that can lead to an XSS attack. This vulnerability has been patched in both the frontend and backend implementations. The default `Link` component from `@backstage/core-components` version 1.2.0 and greater will now reject `javascript:` URLs, and there is a global override of `window.open` to do the same. In addition, the catalog model v0.12.4 and greater as well as the catalog backend v1.7.2 and greater now has additional validation built in that prevents `javascript:` URLs in known annotations. As a workaround, the general practice of limiting access to modifying catalog content and requiring code reviews greatly help mitigate this vulnerability.

cvss

Technical severity, 0–10. One row per scoring source.

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:Nsecondary · ENISA EU

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 2.3 · impact 4

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:Nsecondary · OSV

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79USCWE-84US

affected products (9)

Products and version ranges known to be affected.

backstage backstage≤ < 0.12.4enisa_euvdEU
backstage backstage≤ < 1.7.2enisa_euvdEU
backstage backstage≤ < 1.2.0enisa_euvdEU
linuxfoundation backstage catalog-model< 1.2.0nvdUScpe:2.3:a:linuxfoundation:backstage_catalog-model:*:*:*:*:*:*:*:*
linuxfoundation backstage core-components< 0.12.4nvdUScpe:2.3:a:linuxfoundation:backstage_core-components:*:*:*:*:*:*:*:*
linuxfoundation backstage plugin-catalog-backend< 1.7.2nvdUScpe:2.3:a:linuxfoundation:backstage_plugin-catalog-backend:*:*:*:*:*:*:*:*
npm @backstage/catalog-model< 1.2.0osvUSpkg:npm/%40backstage/catalog-model
npm @backstage/core-components< 0.12.4osvUSpkg:npm/%40backstage/core-components
npm @backstage/plugin-catalog-backend< 1.7.2osvUSpkg:npm/%40backstage/plugin-catalog-backend

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-7hv8-3fr9-j2hvCross site scripting Vulnerability in backstage Software Catalog2023-02-14ghsa · osvUS
### Impact This vulnerability allows a malicious actor with access to add or modify content in an instance of the Backstage software catalog to inject script URLs in the entities stored in the catalog. If users of the catalog then click on said URLs, that can lead to an XSS attack. ### Patches This vulnerability has been patched in both the frontend and backend implementations. The default `Link` component from `@backstage/core-components` will now reject `javascript:` URLs, and there is a global override of `window.open` to do the same. In addition the catalog model as well as the catalog backend now has additional validation built in that prevents `javascript:` URLs in known annotations. ### Workarounds The general practice of limiting access to modifying catalog content and requiring code reviews greatly helps mitigate this vulnerability. ### For more information If you have any questions or comments about this advisory: * Open an issue in the [Backstage repository](https://github.com/backstage/backstage) * Visit our chat, linked to in the [Backstage README](https://github.com/backstage/backstage)

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2023-02-14modified 2026-06-17

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+52994 more

references (8)

External citations — patches, advisories, analysis.

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