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MEDIUM severity

CVE-2019-25091 — nsupdate

MEDIUMFix: nsupdate-info/nsupdate.info@60a3fe5

CVE-2019-25091 is a medium-severity (CVSS 5.3) CWE-1004 vulnerability in nsupdate. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

nsupdate.info has Sensitive Cookie Without 'HttpOnly' Flag

Also known asGHSA-mwvp-qr62-cvjxPYSEC-2026-885
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.00%0.39%0.78%1.17%0.3%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍nsupdate

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability classified as problematic has been found in nsupdate.info. This affects an unknown part of the file src/nsupdate/settings/base.py of the component CSRF Cookie Handler. The manipulation of the argument CSRF_COOKIE_HTTPONLY leads to cookie without 'httponly' flag. It is possible to initiate the attack remotely. The name of the patch is 60a3fe559c453bc36b0ec3e5dd39c1303640a59a. It is recommended to apply a patch to fix this issue. The identifier VDB-216909 was assigned to this vulnerability.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPInsupdateall versionsNo fix

Affected Products

1 product · 1 configurations
Application
nsupdate.infonsupdate
< 2019-05-19
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nsupdate, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of nsupdate for CVE-2019-25091. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

A vulnerability classified as problematic has been found in nsupdate.info. This affects an unknown part of the file src/nsupdate/settings/base.py of the component CSRF Cookie Handler. The manipulation of the argument CSRF_COOKIE_HTTPONLY leads to cookie without 'httponly' flag. It is possible to initiate the attack remotely. The name of the patch is 60a3fe559c453bc36b0ec3e5dd39c1303640a59a. It is recommended to apply a patch to fix this issue. The identifier VDB-216909 was assigned to this vulnerability.
O3 Security · Impact-Aware SCA

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CVE-2019-25091: nsupdate CSRF (Medium 5.3)