CVE-2023-52431 — The Plack::Middleware::XSRFBlock package before 0

The Plack::Middleware::XSRFBlock package before 0.0.19 for Perl allows attackers to bypass a CSRF protection mechanism via an empty form value and an empty cookie (if signed cookies are disabled).

01What is this vulnerability?

The Plack::Middleware::XSRFBlock package before 0.0.19 for Perl allows attackers to bypass a CSRF protection mechanism via an empty form value and an empty cookie (if signed cookies are disabled).

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-02-13T00:00:00.000Z
• Last modified: 2025-04-24T15:40:18.584Z

09References

• metacpan.org — https://metacpan.org/release/DAKKAR/Plack-Middleware-XSRFBlock-0.0.19/source/Cha…
• github.com — https://github.com/briandfoy/cpan-security-advisory/blob/9374f98bef51e1ae887f293…