CVE-2026-121551
PostfixAdmin through 4.0.5 Stored XSS via TOTP Exception Description
CVE-2026-121551 is a medium vulnerability (CVSS 5.1) in Postfixadmin, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 21st percentile. No source names a fixed version.
- Severity
- 5.1 MediumCVSS 4.0, CVE List
- Exploit chance
- 0.28%EPSS, 21st percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- None
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
postfixadminDebian:14 | All versions, plus listed versions 3.3.15+ds-24.0.1+ds-14.0.4+ds-14.0.5+ds+~cs20.241.5-14.0.5+ds-14.0.6+ds+~cs20.241.7-1 | None known |
postfixadminUbuntu:16.04:LTS | All versions, plus listed versions 2.3.7-12.3.7-1ubuntu1 | None known |
postfixadminUbuntu:Pro:18.04:LTS | All versions, plus listed versions 3.0.2-23.0.2-2ubuntu0.1~esm1 | None known |
postfixadminUbuntu:Pro:20.04:LTS | All versions, plus listed versions 3.2.1-23.2.1-33.2.1-3ubuntu0.1~esm1 | None known |
postfixadminUbuntu:Pro:22.04:LTS | All versions, plus listed versions 3.3.7-13.3.10-23.3.10-2ubuntu0.1~esm1 | None known |
postfixadminUbuntu:Pro:24.04:LTS | All versions, plus listed versions 3.3.13-13.3.13-1ubuntu0.1~esm1 | None known |
postfixadminUbuntu:26.10 | All versions, plus listed versions 4.0.1+ds-14.0.4+ds-14.0.5+ds-1 | None known |
postfixadminUbuntu:26.04:LTS | All versions, plus listed versions 3.3.15+ds-24.0.1+ds-1 | None known |
What each source reports
CVE List Score used
PostfixAdmin through 4.0.5 Stored XSS via TOTP Exception Description
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
CVE-2026-121551- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-03
EUVDEUVD-2026-115896
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
EUVD-2026-115896- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3mcr-px3q-mcw8
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows...
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
GHSA-3mcr-px3q-mcw8- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-03
NVD
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
CVE-2026-121551- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-03
OSV
PostfixAdmin through 4.0.5 Stored XSS via TOTP Exception Description
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
CVE-2026-121551- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - Weakness
- CWE-79
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-121551
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
DEBIAN-CVE-2026-121551- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-11
OSVUBUNTU-CVE-2026-121551
PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.
- Record
UBUNTU-CVE-2026-121551- CVSS 4.0
- 5.1 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-05
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| affected, aliases, references | OSV | |
| affected, aliases, references | OSV | |
| references | NVD, OSV | |
| published | EUVD | |
| published | CVE List, EUVD | |
| aliases, references | GitHub Advisories, NVD | |
| cwes, facts, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
github.com/postfixadmin/postfixadmin/issues/1185
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vulncheck.com/advisories/postfixadmin-through-4.0.5-stored-xss-via-totp-exception-description
nvd.nist.gov/vuln/detail/CVE-2026-121551
security-tracker.debian.org/tracker/CVE-2026-121551
ubuntu.com/security/CVE-2026-121551
cve.org/CVERecord?id=CVE-2026-121551