VulnerabilityPublished 27 Mar 2026

CVE-2026-30637: OTCMS · Server-Side Request Forgery (SSRF)

Affects OTCMSSource CVE Database V5

Not known to be exploited · CVSS 7.5 High.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Mar 2026
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

Affected software

Product	Affected	Fixed in
GitHubotcms/OTCMS`pkg:github/otcms/OTCMS`Other threats	Affected >=7.0.0 <=7.66	Fixed in–

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

AI-suggested

To mitigate CVE-2026-30637, organizations should first verify if they are running OTCMS version 7.66 or earlier and restrict access to the /admin/read.php endpoint, ideally limiting it to trusted internal IP addresses or VPN users. Implement network-level controls such as firewall rules to prevent the web server from making arbitrary outbound HTTP requests to internal services. Employ input validation and sanitization on the AnnounContent parameter to block malicious URL inputs. If possible, disable or restrict SSRF-prone functionality until a vendor patch is available. Monitor web server logs for unusual outbound requests or access patterns targeting the vulnerable endpoint. Conduct internal network segmentation to minimize the impact of SSRF exploitation. Engage with the OTCMS vendor or community to obtain or request security patches. Additionally, consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block SSRF attempts targeting this endpoint. Regularly update and audit CMS components to reduce exposure to known vulnerabilities.

Description

Server-Side Request Forgery (SSRF) vulnerability exists in the AnnounContent of the /admin/read.php in OTCMS V7.66 and before. The vulnerability allows remote attackers to craft HTTP requests, without authentication, containing a URL pointing to internal services or any remote server

Impact

The potential impact of CVE-2026-30637 is significant for organizations using OTCMS 7.66 or earlier. Successful exploitation can allow attackers to bypass perimeter defenses and access internal services that are not exposed externally, potentially leading to sensitive data disclosure, unauthorized internal network scanning, or exploitation of other internal vulnerabilities. This can compromise confidentiality and integrity of internal systems and data. Additionally, attackers may leverage this SSRF flaw to interact with cloud metadata services or other critical infrastructure components, escalating privileges or gaining persistent access. The lack of authentication requirement means any external attacker can attempt exploitation, increasing the risk of widespread attacks. Organizations relying on OTCMS for content management, especially those with sensitive internal networks, are at risk of operational disruption and data breaches. The absence of known exploits currently provides a window for remediation, but the vulnerability remains a critical threat if left unaddressed.

CWE-918Server-Side Request Forgery (SSRF) (opens in a new tab)
Base weaknessCWE Top 25 (2025): #22OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
OWASP Cheat Sheets
Server Side Request Forgery Prevention (opens in a new tab)
Unvalidated Redirects and Forwards (opens in a new tab)
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V12.6.1 (opens in a new tab)
V5.2.6 (opens in a new tab)
Attack patterns
Server Side Request Forgery (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/cryingtor/Code-Audit/blob/master/ssrf.md (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Mar 2026, 15:01 UTC

WeaknessesCWE-918

Technical details

References

Community reviews

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