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CVE-2025-67850

Moodle: moodle: cross-site scripting vulnerability via inadequate input filtering in formula editor

7.3 HighFix available

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.30%Up 0.3 points since Feb 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.3

Moodle: moodle: cross-site scripting vulnerability via inadequate input filtering in formula editor

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
CVE-2025-67850
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2025-206736 7.3

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
EUVD-2025-206736
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-6mmv-f6c6-v6q8 7.3

Moodle vulnerable to Cross-site Scripting

A flaw was found in Moodle. This vulnerability, known as Cross-site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
GHSA-6mmv-f6c6-v6q8
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
NVD 7.3

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
CVE-2025-67850
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 7.3

Moodle: moodle: cross-site scripting vulnerability via inadequate input filtering in formula editor

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
CVE-2025-67850
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-6mmv-f6c6-v6q8 7.3

Moodle vulnerable to Cross-site Scripting

A flaw was found in Moodle. This vulnerability, known as Cross-site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
GHSA-6mmv-f6c6-v6q8
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVUBUNTU-CVE-2025-67850 7.3

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
UBUNTU-CVE-2025-67850
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVBIT-moodle-2025-67850 No score

Moodle: moodle: cross-site scripting vulnerability via inadequate input filtering in formula editor

A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Record
BIT-moodle-2025-67850
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
moodle/moodle
Packagist
before 4.1.22
4.1.22
moodle/moodle
Packagist
4.4.0-beta up to 4.4.12
4.4.12
moodle/moodle
Packagist
4.5.0-beta up to 4.5.8
4.5.8
moodle/moodle
Packagist
5.0.0-beta up to 5.0.4
5.0.4
moodle/moodle
Packagist
5.1.0-beta up to 5.1.1
5.1.1
moodle
Bitnami
before 4.1.22, 4.4.0 up to 4.4.11, 4.5.0 up to 4.5.8, 5.0.0 up to 5.0.4, 5.1.0 up to 5.1.1
4.1.224.4.114.5.85.0.45.1.1
moodle/moodle
Packagist
before 4.1.22, plus listed versions
v2.3.10v2.3.11v2.3.4v2.3.5v2.3.6
Show 45 moreShow less
v2.3.7v2.3.8v2.3.9v2.4.0v2.4.0-rc1v2.4.1v2.4.10v2.4.11v2.4.2v2.4.3v2.4.4v2.4.5v2.4.6v2.4.7v2.4.8v2.4.9v2.5.0v2.5.0-betav2.5.0-rc1v2.5.1v2.5.2v2.5.3v2.5.4v2.5.5v2.5.6v2.5.7v2.5.8v2.5.9v2.6.0v2.6.0-betav2.6.0-rc1v2.6.1v2.6.10v2.6.11v2.6.2v2.6.3v2.6.4v2.6.5v2.6.6v2.6.7v2.6.8v2.6.9v2.7.0v2.7.0-betav2.7.0-rc1
4.1.22
moodle/moodle
Packagist
4.4.0-beta up to 4.4.12, plus listed versions
v4.4.0v4.4.0-betav4.4.0-rc1v4.4.0-rc2v4.4.1
Show 10 moreShow less
v4.4.10v4.4.11v4.4.2v4.4.3v4.4.4v4.4.5v4.4.6v4.4.7v4.4.8v4.4.9
4.4.12
moodle/moodle
Packagist
4.5.0-beta up to 4.5.8, plus listed versions
v4.5.0v4.5.0-betav4.5.0-rc1v4.5.0-rc2v4.5.1
Show 6 moreShow less
v4.5.2v4.5.3v4.5.4v4.5.5v4.5.6v4.5.7
4.5.8
moodle/moodle
Packagist
5.0.0-beta up to 5.0.4, plus listed versions
v5.0.0v5.0.0-betav5.0.0-rc1v5.0.0-rc2v5.0.0-rc3v5.0.1v5.0.2v5.0.3
5.0.4
moodle/moodle
Packagist
5.1.0-beta up to 5.1.1, plus listed versions
v5.1.0v5.1.0-betav5.1.0-rc1v5.1.0-rc2
5.1.1
moodle
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
2.7.9+dfsg-12.7.10+dfsg-12.7.11+dfsg-12.7.11+dfsg-22.7.12+dfsg-13.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1
None known
moodle
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
3.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-67850 is a high vulnerability (CVSS 7.3) in Moodle, published February 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. Fixed in moodle/moodle 4.1.22.

References

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