CVE-2021-46900
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not...
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
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
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
CVE-2021-46900- 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-327
- Updated
- 2026-11-02
CVE List
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
CVE-2021-46900- 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-327
- Updated
- 2026-11-02
EUVDEUVD-2021-33548
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
EUVD-2021-33548- 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
GitHub AdvisoriesGHSA-qvwx-3j2c-25v2
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not...
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
GHSA-qvwx-3j2c-25v2- 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-327
- Updated
- 2026-11-02
OSV
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
CVE-2021-46900- 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-2021-46900
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
DEBIAN-CVE-2021-46900- 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-2021-46900
Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.
- Record
UBUNTU-CVE-2021-46900- 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
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
sympaDebian:12 |
before 6.2.66~dfsg-1 | 6.2.66~dfsg-1 |
sympaDebian:13 |
before 6.2.66~dfsg-1 | 6.2.66~dfsg-1 |
sympaDebian:14 |
before 6.2.66~dfsg-1 | 6.2.66~dfsg-1 |
sympaUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 6.1.24~dfsg-16.1.24~dfsg-1ubuntu0.1~esm1 |
None known |
sympaUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 6.2.18~dfsg-16.2.22~dfsg-16.2.24~dfsg-16.2.24~dfsg-1ubuntu0.1~esm16.2.24~dfsg-1ubuntu0.1~esm2 |
None known |
sympaUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 6.2.40~dfsg-16.2.40~dfsg-36.2.40~dfsg-46.2.40~dfsg-4ubuntu0.20.04.1~esm16.2.40~dfsg-4ubuntu0.20.04.1~esm2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-46900 is a high vulnerability (CVSS 7.5) in Sympa, published December 31, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 30th percentile. Fixed in sympa 6.2.66~dfsg-1.
References
sympa.community/security/2021-001.html
github.com/sympa-community/sympa-community.github.io/blob/master/security/2021-001.md
nvd.nist.gov/vuln/detail/CVE-2021-46900
security-tracker.debian.org/tracker/CVE-2021-46900
ubuntu.com/security/CVE-2021-46900
cve.org/CVERecord?id=CVE-2021-46900