HOMEVULNERABILITIESCVE-2021-40642
MEDIUM

CVE-2021-40642

CWE-311Published: June 29, 2022· Updated: Jun 17, 2026

4.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-40642 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected Vendors & Products

textpattern1 product(s)
textpattern
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/textpattern/textpattern/commit/211fab0093999f59b0b61682aa988ac7d8337aa9
PATCHhttps://github.com/textpattern/textpattern/commit/211fab0093999f59b0b61682aa988ac7d8337aa9
ADVISORYhttps://www.huntr.dev/bounties/aadbe434-a376-443b-876f-2a1cbab7847b/
ADVISORYhttps://www.huntr.dev/bounties/aadbe434-a376-443b-876f-2a1cbab7847b/

All References (4)

→
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

Quick Facts

CVE IDCVE-2021-40642
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-311
CISA KEVNo
Affected1 vendor(s)
PublishedJun 29, 2022

Related CVEs (CWE-311)

CVE-2020-15331
9.8
CVE-2023-6339
9.8
CVE-2020-35168
9.8
CVE-2019-11367
9.8
CVE-2019-12924
9.8
CVE-2018-20100
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-40642 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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