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Vulnerabilities

Security fix · CVE-2025-53631

flaskBlog is a blog app built with Flask.

Published Aug 14, 2025 · catalog updated Aug 14, 2025 · DogukanUrker flaskBlog

Check if you run it

No confirmed exploitation is on record for CVE-2025-53631. EPSS is 0.22%. Act only if a listed version of DogukanUrker flaskBlog is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
vendor DogukanUrker flaskBlog ≤ 2.8.1

flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper sanitization of postContent when submitting POST requests to /createpost leads to arbitrary JavaScript execution (XSS) on all pages the post is reflected on including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post. At time of publication, there are no public patches available.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor DogukanUrker flaskBlog ≤ 2.8.1≤ 2.8.1

How to fix CVE-2025-53631

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-53631. EPSS is 0.22%. Act only if a listed version of DogukanUrker flaskBlog is installed.

Which versions are affected?

Compare what you have installed with DogukanUrker flaskBlog ≤ 2.8.1 ≤ 2.8.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 14, 2025 · EUVD

    Detected

    flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper sanitization of postContent when submitting POST requests to /createpost leads to arbitrary JavaScript execution (XSS) on all pages the post is reflected on including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post. At time of publication, there are no public patches available.

  2. Aug 14, 2025 · EUVD

    Updated

    flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper sanitization of postContent when submitting POST requests to /createpost leads to arbitrary JavaScript execution (XSS) on all pages the post is reflected on including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post. At time of publication, there are no public patches available.

Sources

  • CVE.orgVulnerability recordCVE-2025-53631

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-53631

    30-day exploitation probability 0.22%

    first.org
  • EUVDVulnerability recordEUVD-2025-24864

    flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper sanitization of postContent when submitting POST requests to /createpost leads to arbitrary JavaScript execution (XSS) on all pages the post is reflected on including /, /post/[ID], /admin/posts, and

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.