What is CVE-2001-1537?

CVE-2001-1537 is a high-severity vulnerability in Symfony Twig, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2001-12-31.

How severe is CVE-2001-1537?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Symfony Twig

CVE-2001-1537

The default "basic" security setting' in config.php for TWIG webmail 2.7.4 and earlier stores cleartext usernames and passwords in cookies, which could allow attackers to obtain authentication information and gain privileges.

Published 2001-12-31 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Symfony Twig

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

archives.neohapsis.com/archives/bugtraq/2001-11/0245.html (mailing-list, Broken Link)
www.securityfocus.com/bid/3591 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.iss.net/security_center/static/7619.php (vdb-entry, Broken Link)

Frequently asked questions

What is CVE-2001-1537?: CVE-2001-1537 is a high-severity vulnerability in Symfony Twig, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2001-12-31.
How severe is CVE-2001-1537?: High severity. CVSS v3 base score is 7.5 out of 10.