Security Digest · Vulnerability record
CVE-2021-27312: Gleez Cms Server Side Request Forgery (SSRF) vulnerability
Server Side Request Forgery (SSRF) vulnerability in Gleez Cms 1.2.0, allows remote attackers to execute arbitrary code and obtain sensitive information via modules/gleez/classes/request.php.
CVSS 9.4 Critical EPSS 1.0% · p63
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.0%, percentile 63: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 63% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
gleez/cms(Composer (PHP)) <= 1.2.0, no fixed version listed. Check your lockfile, including transitive dependencies.
What it is
Server Side Request Forgery (SSRF) vulnerability in Gleez Cms 1.2.0, allows remote attackers to execute arbitrary code and obtain sensitive information via modules/gleez/classes/request.php.
From the GitHub advisory
Server Side Request Forgery (SSRF) vulnerability in Gleez Cms 1.2.0, allows remote attackers to execute arbitrary code and obtain sensitive information via modules/gleez/classes/request.php.
Weakness type: CWE-918.
Product: gleez/cms (Composer (PHP)) · Assigned by: mitre · Published: 2024-04-03
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Composer (PHP) | gleez/cms | <= 1.2.0 | none listed |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.4 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
| GitHub | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 1.03% probability of exploitation activity in the next 30 days; percentile 63.
Timeline
- — CVE record published by mitre
- — GitHub-reviewed advisory GHSA-7mxg-r76p-363g published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-7mxg-r76p-363g github.com
- CVE.org record CVE-2021-27312 cve.org
- NVD entry CVE-2021-27312 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- gist.github.com gist.github.com
Critical Composer (PHP) advisories · Today’s Security Digest