VulnerabilityPublished 10 Aug 2025Updated 8 Sep 2026

CVE-2025-26526: Moodle · Feedback response viewing and deletions did not respect Separate Groups mode

Affects moodleSource GCVE Database

Not known to be exploited · fixed in 4.5.2 : update moodle when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.5.2, 4.4.6, 4.3.10 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade moodle to 4.5.2, 4.4.6, 4.3.10 or 4.1.16.

Patches and advisories

git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79976 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Bitnamimoodle`pkg:bitnami/moodle`Other threats	Affected >=4.1.0 <4.1.16 >=4.3.0 <4.3.10 >=4.4.0 <4.4.6 >=4.5.0 <4.5.2	Fixed in 4.1.16 4.3.10 4.4.6 4.5.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

An official patch is available and should be applied to affected Moodle versions. The patch addresses the permission checks to properly enforce Separate Groups mode restrictions. Users should upgrade to Moodle versions 4.1.16 or later, 4.3.10 or later, 4.4.6 or later, or 4.5.2 or later as appropriate. No additional mitigation actions are indicated by the vendor.

Description

Moodle versions prior to fixed releases did not enforce Separate Groups mode restrictions when viewing or deleting responses in Feedback activities. This allowed users to access or remove feedback responses outside their assigned groups, violating intended access controls. The issue affects multiple Moodle 4.x versions and has been addressed in official patches.

Impact

Users could bypass group-based access controls in Moodle Feedback activities, potentially viewing or deleting feedback responses from groups they are not authorized to access. This compromises data confidentiality and integrity within group-separated environments. There are no known exploits in the wild at this time.

Summary

The vulnerability CVE-2025-26526 in Moodle involves improper permission checks related to the Separate Groups mode in Feedback activities. Specifically, the system failed to consider group restrictions before allowing users to view or delete feedback responses. This flaw could lead to unauthorized access or deletion of feedback data across group boundaries. The issue affects Moodle versions 4.1.0 through before 4.1.16, 4.3.0 through before 4.3.10, 4.4.0 through before 4.4.6, and 4.5.0 through before 4.5.2. Official patches are available to address this vulnerability.

References

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