CVE-2020-11728
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management...
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
CVE-2020-11728- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-384
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
CVE-2020-11728- Updated
- 2026-11-02
EUVDEUVD-2020-4070 No score
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
EUVD-2020-4070- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gqhq-jmhf-8j84
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management...
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
GHSA-gqhq-jmhf-8j84- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-384
- Updated
- 2026-11-02
OSV
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
CVE-2020-11728- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-11728
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
DEBIAN-CVE-2020-11728- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-11728
An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.
- Record
UBUNTU-CVE-2020-11728- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUSN-4539-1 No score
awl vulnerability
Andrew Bartlett discovered that DAViCal Andrew's Web Libraries (AWL) did not properly manage session keys. An attacker could possibly use this issue to impersonate a session. (CVE-2020-11728)
- Record
USN-4539-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
awlDebian:12 |
before 0.61-1 | 0.61-1 |
awlDebian:13 |
before 0.61-1 | 0.61-1 |
awlDebian:14 |
before 0.61-1 | 0.61-1 |
awlDebian:8 From an advisory covering 2 CVEs |
before 0.55-1+deb8u1, plus listed versions 0.55-1 |
0.55-1+deb8u1 |
awlDebian:9 From an advisory covering 2 CVEs |
before 0.57-1+deb9u1, plus listed versions 0.57-1 |
0.57-1+deb9u1 |
awlDebian:10 From an advisory covering 2 CVEs |
before 0.60-1+deb10u1, plus listed versions 0.60-10.60-1+deb10u1~bpo9+1 |
0.60-1+deb10u1 |
awlUbuntu:16.04:LTS |
All versions, plus listed versions 0.55-10.56-10.56-1ubuntu1 |
None known |
awlUbuntu:18.04:LTS |
All versions, plus listed versions 0.57-10.58-10.59-1 |
None known |
awlUbuntu:20.04:LTS |
before 0.60-1+deb10u1ubuntu1, plus listed versions 0.60-1 |
0.60-1+deb10u1ubuntu1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-11728 is a high vulnerability (CVSS 7.5) in Davical Andrew\'s Web Libraries, published April 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. Fixed in awl 0.61-1.