CVE-2021-40642

Name: CVE-2021-40642
Creator: NVD / NIST
Published: 2022-06-29T11:15:16.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2021-40642 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Textpattern CMS v4.8.7 and older vulnerability exists through Sensitive Cookie in HTTPS Session Without 'Secure' Attribute via textpattern/lib/txplib_misc.php. The secure flag is not set for txp_login session cookie in the application. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

Textpattern CMS v4.8.7 and older vulnerability exists through Sensitive Cookie in HTTPS Session Without 'Secure' Attribute via textpattern/lib/txplib_misc.php. The secure flag is not set for txp_login session cookie in the application. If the secure flag is not set, then the cookie will be transmitted in clear-text if the user visits any HTTP URLs within the cookie's scope. An attacker may be able to induce this event by feeding a user suitable links, either directly or via another web site.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS Probability

0.43%

34.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-311

Affected Software

Vendor	Product	Versions
Textpattern	Textpattern	<= 4.8.7

References

https://github.com/textpattern/textpattern/commit/211fab0093999f59b0b61682aa988ac7d8337aa9Patch, Third Party Advisory
https://www.huntr.dev/bounties/aadbe434-a376-443b-876f-2a1cbab7847b/Permissions Required, Third Party Advisory
https://github.com/textpattern/textpattern/commit/211fab0093999f59b0b61682aa988ac7d8337aa9Patch, Third Party Advisory
https://www.huntr.dev/bounties/aadbe434-a376-443b-876f-2a1cbab7847b/Permissions Required, Third Party Advisory

Timeline

Published: Jun 29, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40642?

How severe is CVE-2021-40642?

CVE-2021-40642 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40642?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40642?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST