CVE-2018-13040: OpenSID 18.06-pasca has a CSRF vulnerability

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HIGH 8.8DOWNGRADE

CVE-2018-13040 is a high-severity flaw (CVSS 8.8) affecting opensid. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenSID 18.06-pasca has a CSRF vulnerability. This vulnerability can add an account (at the admin level) via the index.php/man_user/insert URI.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-352
Published	2018-07-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: opendesa

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-01 18:29 UTCPublished CVE record published
2026-06-17 01:38 UTCUpdated Record last modified

opendesa opensid DOWNGRADE

Affected: 18.06-pasca

Fixed in: no fixed release known

Safe to downgrade to: a release before 18.06-pasca

1. Check installed version

apt-cache policy opensid || rpm -q opensid || opensid --version

2. No fixed release: DOWNGRADE to a release before 18.06-pasca (Debian / Ubuntu)

apt-cache madison opensid sudo apt install opensid=<VERSION_BEFORE_18.06-pasca> sudo apt-mark hold opensid

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list opensid sudo dnf downgrade opensid-<VERSION_BEFORE_18.06-pasca> sudo dnf versionlock add opensid

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-13040?

opensid: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-13040 being exploited?

CVE-2018-13040 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-13040 affect?

CVE-2018-13040 affects opensid. Severity is high (CVSS 8.8). OpenSID 18.06-pasca has a CSRF vulnerability. This vulnerability can add an account (at the admin level) via the index.php/man_user/insert URI.

How urgent is CVE-2018-13040?

Priority 49/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-13039 MEDIUM 6.1 DOWNGRADE OpenSID 18.06-pasca has reflected Cross Site Scripting (XSS) via the cari parameter, aka an index.php/first?ca
CVE-2018-13038 CRITICAL 9.8 DOWNGRADE OpenSID 18.06-pasca has an Unrestricted File Upload vulnerability via an Attachment Document in the article fe

References

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